APT1 Exposing One of Cnina s Cyber Espionage Units C o n te n t s Executive Summary 2 China’s Computer Network Operations Tasking to PLA Unit 61398 61398部队 7 APT1 Years of Espionage 20 APT1 Attack Lifecycle 27 APT1 Infrastructure 39 APT1 Identities 51 Conclusion 59 Appendix A How Does Mandiant Distinguish Threat Groups 61 Appendix B APT and the Attack Lifecycle 63 Appendix C Digital The Malware Arsenal 66 Appendix D Digital FQDNs 67 Appendix E Digital MD5 Hashes 68 Appendix F Digital SSL Certificates 69 Appendix G Digital IOCs 70 Appendix H Digital Video 74 Mandiant APT1 www mandiant com “ China’s economic espionage has reached an intolerable level and I believe that the United States and our allies in Europe and Asia have an obligation to confront Beijing and demand that they put a stop to this piracy Beijing is waging a massive trade war on us all and we should band together to pressure them to stop Combined the United States and our allies in Europe and Asia have significant diplomatic and economic leverage over China and we should use this to our advantage to put an end to this scourge ”1 — U S Rep Mike Rogers October 2011 “ It is unprofessional and groundless to accuse the Chinese military of launching cyber attacks without any conclusive evidence ”2 — Chinese Defense Ministry January 2013 “Mike Rogers Statement to the U S House Permanent Select Committee on Intelligence Open Hearing Cyber Threats and Ongoing Efforts to Protect the Nation Hearing October 4 2011 http intelligence house gov sites intelligence house gov files documents 100411CyberHearingRogers pdf accessed February 6 2013 1 “Chinese hackers suspected in attack on The Post’s computers ” The Washington Post Feb 1 2013 http www washingtonpost com business technology chinese-hackers-suspected-in-attack-on-the-posts-computers 2013 02 01 d5a44fde-6cb1-11e2-bd36-c0fe61a205f6_story html accessed Feb 1 2013 2 Mandiant APT1 1 www mandiant com E x e c u tive Su mma ry Since 2004 Mandiant has investigated computer security breaches at hundreds of organizations around the world The majority of these security breaches are attributed to advanced threat actors referred to as the “Advanced Persistent Threat” APT We first published details about the APT in our January 2010 M-Trends report As we stated in the report our position was that “The Chinese government may authorize this activity but there’s no way to determine the extent of its involvement ” Now three years later we have the evidence required to change our assessment The details we have analyzed during hundreds of investigations convince us that the groups conducting these activities are based primarily in China and that the Chinese Government is aware of them 3 Mandiant continues to track dozens of APT groups around the world however this report is focused on the most prolific of these groups We refer to this group as “APT1” and it is one of more than 20 APT groups with origins in China APT1 is a single organization of operators that has conducted a cyber espionage campaign against a broad range of victims since at least 2006 From our observations it is one of the most prolific cyber espionage groups in terms of the sheer quantity of information stolen The scale and impact of APT1’s operations compelled us to write this report The activity we have directly observed likely represents only a small fraction of the cyber espionage that APT1 has conducted Though our visibility of APT1’s activities is incomplete we have analyzed the group’s intrusions against nearly 150 victims over seven years From our unique vantage point responding to victims we tracked APT1 back to four large networks in Shanghai two of which are allocated directly to the Pudong New Area We uncovered a substantial amount of APT1’s attack infrastructure command and control and modus operandi tools tactics and procedures In an effort to underscore there are actual individuals behind the keyboard Mandiant is revealing three personas we have attributed to APT1 These operators like soldiers may merely be following orders given to them by others Our analysis has led us to conclude that APT1 is likely government-sponsored and one of the most persistent of China’s cyber threat actors We believe that APT1 is able to wage such a long-running and extensive cyber espionage campaign in large part because it receives direct government support In seeking to identify the organization behind this activity our research found that People’s Liberation Army PLA’s Unit 61398 is similar to APT1 in its mission capabilities and resources PLA Unit 61398 is also located in precisely the same area from which APT1 activity appears to originate Our conclusions are based exclusively on unclassified open source information derived from Mandiant observations None of the information in this report involves access to or confirmation by classified intelligence 3 Mandiant APT1 2 www mandiant com KEY FINDINGS APT1 is believed to be the 2nd Bureau of the People’s Liberation Army PLA General Staff Department’s GSD 3rd Department 总参三部二局 which is most commonly known by its Military Unit Cover Designator MUCD as Unit 61398 61398部队 »» The nature of “Unit 61398’s” work is considered by China to be a state secret however we believe it engages in harmful “Computer Network Operations ” »» Unit 61398 is partially situated on Datong Road 大同路 in Gaoqiaozhen 高桥镇 which is located in the Pudong New Area 浦东新区 of Shanghai 上海 The central building in this compound is a 130 663 square foot facility that is 12 stories high and was built in early 2007 »» We estimate that Unit 61398 is staffed by hundreds and perhaps thousands of people based on the size of Unit 61398’s physical infrastructure »» China Telecom provided special fiber optic communications infrastructure for the unit in the name of national defense »» Unit 61398 requires its personnel to be trained in computer security and computer network operations and also requires its personnel to be proficient in the English language »» Mandiant has traced APT1’s activity to four large networks in Shanghai two of which serve the Pudong New Area where Unit 61398 is based APT1 has systematically stolen hundreds of terabytes of data from at least 141 organizations and has demonstrated the capability and intent to steal from dozens of organizations simultaneously 4 »» Since 2006 Mandiant has observed APT1 compromise 141 companies spanning 20 major industries »» APT1 has a well-defined attack methodology honed over years and designed to steal large volumes of valuable intellectual property »» Once APT1 has established access they periodically revisit the victim’s network over several months or years and steal broad categories of intellectual property including technology blueprints proprietary manufacturing processes test results business plans pricing documents partnership agreements and emails and contact lists from victim organizations’ leadership »» APT1 uses some tools and techniques that we have not yet observed being used by other groups including two utilities designed to steal email — GETMAIL and MAPIGET »» APT1 maintained access to victim networks for an average of 356 days 5 The longest time period APT1 maintained access to a victim’s network was 1 764 days or four years and ten months »» Among other large-scale thefts of intellectual property we have observed APT1 stealing 6 5 terabytes of compressed data from a single organization over a ten-month time period »» In the first month of 2011 APT1 successfully compromised at least 17 new victims operating in 10 different industries We believe that the extensive activity we have directly observed represents only a small fraction of the cyber espionage that APT1 has conducted Therefore Mandiant is establishing the lower bounds of APT1 activities in this report 4 This is based on 91 of the 141 victim organizations In the remaining cases APT1 activity is either ongoing or else we do not have visibility into the last known date of APT1 activity in the network 5 Mandiant APT1 3 www mandiant com APT1 focuses on compromising organizations across a broad range of industries in English-speaking countries »» Of the 141 APT1 victims 87% of them are headquartered in countries where English is the native language »» The industries APT1 targets match industries that China has identified as strategic to their growth including four of the seven strategic emerging industries that China identified in its 12th Five Year Plan APT1 maintains an extensive infrastructure of computer systems around the world »» APT1 controls thousands of systems in support of their computer intrusion activities »» In the last two years we have observed APT1 establish a minimum of 937 Command and Control C2 servers hosted on 849 distinct IP addresses in 13 countries The majority of these 849 unique IP addresses were registered to organizations in China 709 followed by the U S 109 »» In the last three years we have observed APT1 use fully qualified domain names FQDNs resolving to 988 unique IP addresses »» Over a two-year period January 2011 to January 2013 we confirmed 1 905 instances of APT1 actors logging into their attack infrastructure from 832 different IP addresses with Remote Desktop a tool that provides a remote user with an interactive graphical interface to a system »» In the last several years we have confirmed 2 551 FQDNs attributed to APT1 In over 97% of the 1 905 times Mandiant observed APT1 intruders connecting to their attack infrastructure APT1 used IP addresses registered in Shanghai and systems set to use the Simplified Chinese language »» In 1 849 of the 1 905 97% of the Remote Desktop sessions APT1 conducted under our observation the APT1 operator’s keyboard layout setting was “Chinese Simplified — US Keyboard” Microsoft’s Remote Desktop client configures this setting automatically based on the selected language on the client system Therefore the APT1 attackers likely have their Microsoft® operating system configured to display Simplified Chinese fonts »» 817 of the 832 98% IP addresses logging into APT1 controlled systems using Remote Desktop resolved back to China »» We observed 767 separate instances in which APT1 intruders used the “HUC Packet Transmit Tool” or HTRAN to communicate between 614 distinct routable IP addresses and their victims’ systems using their attack infrastructure Of the 614 distinct IP addresses used for HTRAN communications −− 614 of 614 100% were registered in China −− 613 99 8% were registered to one of four Shanghai net blocks Mandiant APT1 4 www mandiant com The size of APT1’s infrastructure implies a large organization with at least dozens but potentially hundreds of human operators »» We conservatively estimate that APT1’s current attack infrastructure includes over 1 000 servers »» Given the volume duration and type of attack activity we have observed APT1 operators would need to be directly supported by linguists open source researchers malware authors industry experts who translate task requests from requestors to the operators and people who then transmit stolen information to the requestors »» APT1 would also need a sizable IT staff dedicated to acquiring and maintaining computer equipment people who handle finances facility management and logistics e g shipping In an effort to underscore that there are actual individuals behind the keyboard Mandiant is revealing three personas that are associated with APT1 activity »» The first persona “UglyGorilla” has been active in computer network operations since October 2004 His activities include registering domains attributed to APT1 and authoring malware used in APT1 campaigns “UglyGorilla” publicly expressed his interest in China’s “cyber troops” in January 2004 »» The second persona an actor we call “DOTA” has registered dozens of email accounts used to conduct social engineering and spear phishing attacks in support of APT1 campaigns “DOTA” used a Shanghai phone number while registering these accounts »» We have observed both the “UglyGorilla” persona and the “DOTA” persona using the same shared infrastructure including FQDNs and IP ranges that we have attributed to APT1 »» The third persona who uses the nickname “SuperHard ” is the creator or a significant contributor to the AURIGA and BANGAT malware families which we have observed APT1 and other APT groups use “SuperHard” discloses his location to be the Pudong New Area of Shanghai Mandiant is releasing more than 3 000 indicators to bolster defenses against APT1 operations »» Specifically Mandiant is providing the following −− Digital delivery of over 3 000 APT1 indicators such as domain names IP addresses and MD5 hashes of malware −− Sample Indicators of Compromise IOCs and detailed descriptions of over 40 families of malware in APT1’s arsenal of digital weapons −− Thirteen 13 X 509 encryption certificates used by APT1 −− A compilation of videos showing actual attacker sessions and their intrusion activities »» While existing customers of Mandiant’s enterprise-level products Mandiant Managed Defense and Mandiant Intelligent Response® have had prior access to these APT1 Indicators we are also making them available for use with Redline™ our free host-based investigative tool Redline can be downloaded at http www mandiant com resources download redline Mandiant APT1 5 www mandiant com Conclusion The sheer scale and duration of sustained attacks against such a wide set of industries from a singularly identified group based in China leaves little doubt about the organization behind APT1 We believe the totality of the evidence we provide in this document bolsters the claim that APT1 is Unit 61398 However we admit there is one other unlikely possibility A secret resourced organization full of mainland Chinese speakers with direct access to Shanghai-based telecommunications infrastructure is engaged in a multi-year enterprise scale computer espionage campaign right outside of Unit 61398’s gates performing tasks similar to Unit 61398’s known mission Why We Are Exposing APT1 The decision to publish a significant part of our intelligence about Unit 61398 was a painstaking one What started as a “what if” discussion about our traditional non-disclosure policy quickly turned into the realization that the positive impact resulting from our decision to expose APT1 outweighed the risk to our ability to collect intelligence on this particular APT group It is time to acknowledge the threat is originating in China and we wanted to do our part to arm and prepare security professionals to combat that threat effectively The issue of attribution has always been a missing link in publicly understanding the landscape of APT cyber espionage Without establishing a solid connection to China there will always be room for observers to dismiss APT actions as uncoordinated solely criminal in nature or peripheral to larger national security and global economic concerns We hope that this report will lead to increased understanding and coordinated action in countering APT network breaches At the same time there are downsides to publishing all of this information publicly Many of the techniques and technologies described in this report are vastly more effective when attackers are not aware of them Additionally publishing certain kinds of indicators dramatically shortens their lifespan When Unit 61398 changes their techniques after reading this report they will undoubtedly force us to work harder to continue tracking them with such accuracy It is our sincere hope however that this report can temporarily increase the costs of Unit 61398’s operations and impede their progress in a meaningful way We are acutely aware of the risk this report poses for us We expect reprisals from China as well as an onslaught of criticism Mandiant APT1 6 www mandiant com Ch i n a’ s C o mpu te r Ne two r k Oper at i on s Ta s k in g t o P LA Unit 6 1 3 9 8 6 1 3 9 8 部队 Our research and observations indicate that the Communist Party of China CPC 中国共产党 is tasking the Chinese People’s Liberation Army PLA 中国人民解放军 to commit systematic cyber espionage and data theft against organizations around the world This section provides photos and details of Unit 61398 facilities Chinese references discussing the unit’s training and coursework requirements and internal Chinese communications documenting the nature of the unit’s relationship with at least one state-owned enterprise These details will be particularly relevant when we discuss APT1’s expertise personnel location and infrastructure which parallel those of Unit 61398 The Communist Party of China The PLA’s cyber command is fully institutionalized within the CPC and able to draw upon the resources of China’s stateowned enterprises to support its operations The CPC is the ultimate authority in Mainland China unlike in Western societies in which political parties are subordinate to the government the military and government in China are subordinate to the CPC In fact the PLA reports directly to the CPC’s Central Military Commission CMC 中央军事委 员会 6 This means that any enterprise cyber espionage campaign within the PLA is occurring at the direction of senior members of the CPC We believe that the PLA’s strategic cyber command is situated in the PLA’s General Staff Department GSD 总参谋 部 specifically its 3rd Department 总参三部 7 The GSD is the most senior PLA department Similar to the U S Joint Chiefs of Staff the GSD establishes doctrine and provides operational guidance for the PLA Within the GSD the 3rd Department has a combined focus on signals intelligence foreign language proficiency and defense information James C Mulvenon and Andrew N D Yang editors The People’s Liberation Army as Organization Reference Volume v1 0 Santa Monica CA RAND Corporation 2002 96 http www rand org pubs conf_proceedings CF182 html accessed February 6 2013 6 Bryan Krekel Patton Adams and George Bakos “Occupying the Information High Ground Chinese Capabilities for Computer Network Operations and Cyber Espionage ” Prepared for the U S -China Economic and Security Review Commission by Northrop Grumman Corp 2012 10 http www uscc gov RFP 2012 USCC%20Report_Chinese_CapabilitiesforComputer_NetworkOperationsandCyberEspionage pdf accessed February 6 2013 7 Mandiant APT1 7 www mandiant com systems 8 It is estimated to have 130 0009 personnel divided between 12 bureaus 局 three research institutes and 16 regional and functional bureaus 10 We believe that the GSD 3rd Department 2nd Bureau 总参三部二局 is the APT group that we are tracking as APT1 Figure 1 shows how close the 2nd Bureau sits to the highest levels of the CPC At this level the 2nd Bureau also sits atop a large-scale organization of subordinate offices Communist Party of China Central Military Commission ᷕ⣖⅃ḳ⥼␀肋 PLA General Staff Department 肣能害悐 GSD 1st Department 肣能ᶨ悐 Operations PLA General Political Department 肣㓧㱣悐 GSD 2nd Department 肣能Ḵ悐 Intelligence 1st Bureau 总参三部一局 PLA General Logistics Department 肣⎶⊌悐 GSD 3rd Department 肣能ᶱ悐 SIGINT CNO 2nd Bureau 总参三部二局 Unit 61398 PLA General Armaments Department 肣畯肛悐 7 Military Regions PLA Airforce PLAA PLA Navy PLAN 12 Total Bureaus 3 Research Institutes Figure 1 Unit 61398’s position within the PLA11 The 3rd department’s mission is roughly a blend of the missions assigned to the U S National Security Agency the Defense Language Institute and parts of the Defense Information Systems Agency 8 Bryan Krekel Patton Adams and George Bakos “Occupying the Information High Ground Chinese Capabilities for Computer Network Operations and Cyber Espionage ” Prepared for the U S -China Economic and Security Review Commission by Northrop Grumman Corp 2012 47 http www uscc gov RFP 2012 USCC%20Report_Chinese_CapabilitiesforComputer_NetworkOperationsandCyberEspionage pdf accessed February 6 2013 9 Ian Easton and Mark A Stokes “China’s Electronic Intelligence Satellite Developments Implications for U S Air and Naval Operations ” Project 2049 Institute 2011 5 http project2049 net documents china_electronic_intelligence_elint_satellite_developments_easton_stokes pdf accessed February 6 2013 10 James C Mulvenon and Andrew N D Yang editors The People’s Liberation Army as Organization Reference Volume v1 0 Santa Monica CA RAND Corporation 2002 96 http www rand org pubs conf_proceedings CF182 html accessed February 6 2013 11 Mandiant APT1 8 www mandiant com Inferring the Computer Network Operations Mission and Capabilities of Unit 61398 61398部队 Publicly available references confirm that the PLA GSD’s 3rd Department 2nd Bureau is Military Unit Cover Designator MUCD 61398 more commonly known as Unit 61398 12 They also clearly indicate that Unit 61398 is tasked with computer network operations CNO 13 The Project 2049 Institute reported in 2011 that Unit 61398 “appears to function as the Third Department s premier entity targeting the United States and Canada most likely focusing on political economic and military-related intelligence ”14 Our research supports this and also suggests Unit 61398’s CNO activities are not limited to the U S and Canada but likely extend to any organization where English is the primary language What is a MUCD Chinese military units are given MUCDs five-digit numerical sequences to provide basic anonymity for the unit in question and as a standardized reference that facilitates communications and operations e g “Unit 81356 is moving to the objective ” versus “1st Battalion 125th Regiment 3rd Division 14th Group Army is moving to the objective” Military Unit Cover Designators are also used in official publications and on the Internet to refer to the unit in question The MUCD numbers are typically displayed outside a unit’s barracks as well as on the unit’s clothing flags and stationary Source The Chinese Army Today Tradition and Transformation for the 21st Century — Dennis J Blasko Identifying GSD 3rd Department 2nd Bureau as Unit 61398 The care with which the PLA maintains the separation between the GSD 3rd Department 2nd Bureau and the MUCD 61398 can be partially observed by searching the Internet for official documents from the Chinese government that refer to both the 2nd Bureau and Unit 61398 Figure 2 shows the results of one of these queries Figure 2 No results found for searching for “GSD 3rd Department 2nd Bureau” and “Unit 61398” on any Chinese government websites Despite our challenges finding a link between the Chinese Government and Unit 61398 online our searches did find references online indicating that the GSD 3rd Department 2nd Bureau is actually Unit 61398 Specifically Google indexed references to Unit 61398 in forums and resumes Once these references were discovered by CPC censors these postings and documents were likely modified or removed from the Internet Figure 3 shows Google search results Mark A Stokes Jenny Lin and L C Russell Hsiao “The Chinese People’s Liberation Army Signals Intelligence and Cyber Reconnaissance Infrastructure ” Project 2049 Institute 2011 8 http project2049 net documents pla_third_department_sigint_cyber_stokes_lin_hsiao pdf accessed February 6 2013 12 U S Department of Defense defines Computer Network Operations as “Comprised of computer network attack computer network defense and related computer network exploitation enabling operations Also called CNO • computer network attack Actions taken through the use of computer networks to disrupt deny degrade or destroy information resident in computers and computer networks or the computers and networks themselves Also called CNA • computer network defense Actions taken to protect monitor analyze detect and respond to unauthorized activity within the Department of Defense information systems and computer networks Also called CND • computer network exploitation Enabling operations and intelligence collection capabilities conducted through the use of computer networks to gather data from target or adversary automated information systems or networks Also called CNE ” U S Department of Defense The Dictionary of Military Terms New York Skyhorse Publishing Inc 112 13 Mark A Stokes Jenny Lin and L C Russell Hsiao “The Chinese People’s Liberation Army Signals Intelligence and Cyber Reconnaissance Infrastructure ” Project 2049 Institute 2011 8 http project2049 net documents pla_third_department_sigint_cyber_stokes_lin_hsiao pdf accessed February 6 2013 14 Mandiant APT1 9 www mandiant com for unit 61398 and some responsive “hits” note that the links that appear in these search results will likely have been removed by the time you read this report Figure 3 Google search results that show Unit 61398 attribution “leaks” Unit 61398’s Personnel Requirements Unit 61398 appears to be actively soliciting and training English speaking personnel specializing in a wide variety of cyber topics Former and current personnel from the unit have publicly alluded to these areas of emphasis For example a graduate student of covert communications Li Bingbing 李兵兵 who openly acknowledged his affiliation with Unit 61398 published a paper in 2010 that discussed embedding covert communications within Microsoft® Word documents Another example is English linguist Wang Weizhong’s 王卫忠 biographical information provided to the Hebei 河北 Chamber of Commerce which describes the training he received as an English linguist while assigned to Unit 61398 These and other examples that demonstrate Unit 61398’s areas of expertise are listed in Table 1 below 15 Table 1 Chinese sources referring to the areas of expertise contained in Unit 61398 16 17 18 19 Type of Expertise in Unit 61398 部队 Source Describing that Expertise in Unit 61398 Covert Communications Article in Chinese academic journal Second author Li Bingbing 李兵兵 references Unit 61398 as the source of his expertise on the topic 15 English Linguistics Bio of Hebei Chamber of Commerce member Wang Weizhong 王卫忠 He describes that he received his training as an English linguist during his service in Unit 61398 Hebei is a borough in Shanghai 16 Operating System Internals Article in Chinese academic journal Second author Yu Yunxiang 虞云翔 references Unit 61398 as the source of his expertise on the topic 17 Digital Signal Processing Article in Chinese academic journal Second author Peng Fei 彭飞 references Unit 61398 as the source of his expertise on the topic 18 Network Security Article in Chinese academic journal Third author Chen Yiqun 陈依群 references Unit 61398 as the source of his expertise on the topic 19 Li Bing-bing Wang Yan-Bo and Xu Ming “An information hiding method of Word 2007 based on image covering ” Journal of Sichuan University Natural Science Edition 47 2010 http www paper edu cn journal downCount 0490-6756 2010 S1-0031-06 accessed February 6 2013 15 Hebei Chamber of Commerce Bio of member Wang Weizhong 2012 http www hbsh org shej_ejsheqmsg aspx mid 26 uid 06010000 aid 06 accessed February 6 2013 16 Zeng Fan-jing Yu Yun-xiang and Chang Li “The Implementation of Overlay File System in Embedded Linux ” Journal of Information Engineering University 7 2006 http file lw23 com 9 98 984 98401889-9da6-4c38-b9d2-5a5202fd1a33 pdf accessed February 6 2013 17 Zhao Ji-yong Peng Fei and Geng Chang-suo “ADC’s Performance and Selection Method of Sampling Number of Bits ” Journal of Military Communications Technology 26 2005 http file lw23 com f f1 f14 f14e7b60-3d60-4184-a48f-4a50dd21927c pdf accessed February 6 2013 18 Chen Qiyun Chen Xiuzhen Chen Yiqun and Fan Lei “Quantization Evaluation Algorithm for Attack Graph Based on Node Score ” Computer Engineering 36 2010 http www ecice06 com CN article downloadArticleFile do attachType PDF id 19627 accessed February 7 2013 19 Mandiant APT1 10 www mandiant com Additionally there is evidence that Unit 61398 aggressively recruits new talent from the Science and Engineering departments of universities such as Harbin Institute of Technology 哈尔滨工业大学 and Zhejiang University School of Computer Science and Technology 浙江大学计算机学院 The majority of the “profession codes” 专业代码 describing positions that Unit 61398 is seeking to fill require highly technical computer skills The group also appears to have a frequent requirement for strong English proficiency Table 2 provides two examples of profession codes for positions in Unit 61398 along with the required university courses and proficiencies associated with each profession 20 Table 2 Two profession codes and university recommended courses for students intending to apply for positions in Unit 61398 Profession Code Required Proficiencies 080902 — Circuits and Systems »» 101 — Political »» 201 — English »» 301 — Mathematics »» 842 — Signal and Digital Circuits or 840 - Circuits »» Interview plus a small written test −− Circuits and Systems-based professional knowledge and comprehensive capacity −− Team spirit and ability to work with others to coordinate −− English proficiency 081000 — Information and Communications Engineering »» 101 - Political »» 201 – British English »» 301 - Mathematics »» 844 - Signal Circuit Basis Size and Location of Unit 61398’s Personnel and Facilities Based on the size of Unit 61398’s physical infrastructure we estimate that the unit is staffed by hundreds and perhaps thousands This is an extrapolation based on public disclosures from within China describing the location and physical installations associated with Unit 61398 For example public sources confirm that in early 2007 Jiangsu Longhai Construction Engineering Group 江苏龙海建工集团有限公司 completed work on a new building for Unit 61398 located at Datong Road 208 within the Pudong New Area of Shanghai 上海市浦东新区高桥镇大同路208号 21 which is referred to as the “Unit 61398 Center Building” 61398部队中心大楼 At 12 stories in height and offering 130 663 square feet of space we estimate that this building houses offices for approximately 2 000 people Figure 4 through Figure 7 provide overhead views and street-level views of the building and its location showing its size This is only one of the unit’s several buildings some of which are even larger Two Chinese universities hosting Unit 61398 recruiting events • Zhejiang University http www cs zju edu cn chinese redir php catalog_id 101913 object_id 106021 • Harbin Institute of Technology http today hit edu cn articles 2004 2-23 12619 htm 20 See http www czzbb net czzb YW_Info YW_ZiGeYS BaoMingInfo aspx YW_RowID 41726 BiaoDuanBH CZS20091202901 enterprise_ id 70362377-3 for documentation of the contract award to Jiangsu Langhai Construction Engineering Group for Unit 61398’s Center Building among several other buildings accessed February 5 2013 21 Mandiant APT1 11 www mandiant com Figure 4 Datong circa 2006 prior to Unit 61398 Center Building construction Image Copyright 2013 DigitalGlobe Mandiant APT1 12 www mandiant com Figure 5 Datong Circa 2008 Unit 61398 Center Building visible at 208 Datong Image Copyright 2013 DigitalGlobe Mandiant APT1 13 www mandiant com Figure 6 Unit 61398 Center Building main gate soldiers visible Image Copyright 2013 city8 com Mandiant APT1 14 www mandiant com Figure 7 Unit 61398 Center Building 208 Datong rear view possible generator exhausts visible Image Copyright 2013 city8 com Mandiant APT1 15 www mandiant com Unit 61398 also has a full assortment of support units and associated physical infrastructure much of which is located on a stretch of Datong Road 大同路 in Gaoqiaozhen 高桥镇 in the Pudong New Area 浦东新区 of Shanghai 上 海 22 These support units include a logistics support unit outpatient clinic and kindergarten as well as guesthouses located both in Gaoqiaozhen and in other locations in Shanghai 23 These amenities are usually associated with large military units or units at higher echelons The close proximity of these amenities supports the contention that Unit 61398 occupies a high-level position in the PLA organizational hierarchy see Figure 1 Unit 61398’s positions within the PLA 24 PLA Unit 61398 and State-Owned Enterprise China Telecom are Co-building Computer Network Operations Infrastructure Mandiant found an internal China Telecom document online that provides details about the infrastructure provided to Unit 61398 The memo in Figure 8 reveals China Telecom executives deciding to “co-build” with Unit 61398 to justify the use of their own inventory in the construction of fiber optic communication lines “based on the principle that national defense construction is important ” The letter also appears to indicate that this is a special consideration being made outside of China Telecom’s “normal renting method” for Unit 61398 Additionally the memo clarifies the phrase “Unit 61398” with the comment “ GSD 3rd Department 2nd Bureau ” The memo not only supports the identity of Unit 61398 as GSD’s 3rd Department 2nd Bureau but also reveals the relationship between a “very important communication and control department” Unit 61398 and a state-influenced enterprise 22 23 Confirmation of several other Unit 61398 support facilities along Datong Road Address 上海市浦东新区大同路50号 Pudong New Area Shanghai Datong Road 50 Building Name 中国人民解放军第61398部队司令部 People’s Liberation Army Unit 61398 Headquarters Source Chinese phone book listing building name and address http 114 mingluji com minglu %E4%B8%AD%E5%9B%BD%E4%BA%BA%E6 %B0%91%E8%A7%A3%E6%94%BE%E5%86%9B% E7%AC%AC61398%E9%83%A8%E9%98%9F%E5%8F%B8%E4%BB%A4%E9%83%A8 accessed February 6 2013 Address 上海市浦东新区大同路118弄甲 Pudong New Area Shanghai Datong Road 118 A Building Name 中国人民解放军第61398部队司令部 People’s Liberation Army Unit 61398 Headquarters Chinese phone book listing building name and address http 114 mingluji com minglu %E4%B8%AD%E5%9B%BD%E4%BA%BA%E6%B0% 91%E8%A7%A3%E6%94%BE%E5%86%9B%E7%AC%AC61398%E9%83%A8%E9%98%9F%E5%8F%B8%E4%BB%A4%E9%83%A8_0 accessed February 6 2013 Address 上海市浦东新区高桥镇大同路135号 Pudong New Area Shanghai Gaoqiao Town Datong Road 135 Building Name 中国人民解放军第61398部队 People’s Liberation Army Unit 61398 Chinese phone book listing building name and address http 114 mingluji com minglu %E4%B8%AD%E5%9B%BD%E4%BA%BA%E6%B0%9 1%E8%A7%A3%E6%94%BE%E5%86%9B%E7%AC%AC61398%E9%83%A8%E9%98%9F_0 accessed February 6 2013 Address 上海市浦东新区高桥镇大同路153号 Pudong New Area Shanghai Gaoqiao Town Datong Road 153 Building Name 中国人民解放军第61398部队 People’s Liberation Army Unit 61398 Chinese phone book listing building name and address http 114 mingluji com minglu %E4%B8%AD%E5%9B%BD%E4%BA%BA%E6%B0%9 1%E8%A7%A3%E6%94%BE%E5%86%9B%E7%AC%AC61398%E9%83%A8%E9%98%9F accessed February 6 2013 Address 上海市浦东新区大同路305号 Pudong New Area Shanghai Datong Road 305 Building Name 中国人民解放军第61398部队后勤部 Logistics Department of the Chinese People’s Liberation Army Unit 61 398 Chinese phone book listing building name and address http 114 mingluji com category %E7%B1%BB%E5%9E%8B %E4%B8%AD%E5%9B%BD%E4%BA%BA%E6%B0%91%E8%A7%A3%E6%94%BE%E5%86%9B page 69 accessed February 6 2013 Unit 61398 Kindergarden Listed in Shanghai Pudong http www pudong-edu sh cn Web PD jyzc_school aspx SiteID 45 UnitID 2388 James C Mulvenon and Andrew N D Yang editors The People’s Liberation Army as Organization Reference Volume v1 0 Santa Monica CA RAND Corporation 2002 125 http www rand org pubs conf_proceedings CF182 html accessed February 6 2013 24 Mandiant APT1 16 www mandiant com Figure 8 China Telecom Memo discussing Unit 61398 source http r9 he3 com cn %E8%A7%84%E5%88%92 %E9%81%93%E8%B7%AF%E5%8F%8A%E5%85%B6%E 4%BB%96%E8%A7%84%E5%88%92%E5%9B%BE%E7%BA%B8 %E4%BF%A1%E6%81%AF%E5%9B%A D%E5%8C%BA %E5%85%B3%E4%BA%8E%E6%80%BB%E5%8F%82%E4%B8%89%E9%83%A8%E4%B A%8C%E5%B1%80-%E4%B8%8A%E6%B5%B7005%E4%B8%AD%E5%BF%83%E9%9C%80%E4%BD%BF%E7%94%A8%E6%88%91%E5%85%AC%E5%8F%B8%E9%80%9A%E4%BF%A1 pdf25 25 This link has Chinese characters in it which are represented in URL encoding Mandiant APT1 17 www mandiant com Market Department Examining Control Affairs Division Report Requesting Concurrence Concerning the General Staff Department 3rd Department 2nd Bureau Request to Use Our Company’s Communication Channel Division Leader Wu The Chinese People’s Liberation Army Unit 61398 General Staff Department 3rd Department 2nd Bureau wrote to us a few days ago saying that in accordance with their central command “8508” on war strategy construction or infrastructure need the General Staff Department 3rd Department 2nd Bureau Gaoqiao Base needs to communicate with Shanghai City 005 Center Shanghai Intercommunication Network Control Center within East Gate Bureau regarding intercommunication affairs This bureau already placed fiber-optic cable at the East Gate front entrance road pole They need to use two ports to enter our company’s East Gate communication channel The length is about 30m At the same time the second stage construction in Gaoqiao Base needs to enter into our company’s Shanghai Nanhui Communication Park 005 Center special-use bureau This military fiber-optic cable has already been placed at the Shanghai Nanhui Communication Park entrance They need to use 4 of our company ports inside the Nanhui Communication Park to enter The length is 600m Upon our division’s negotiation with the 3rd Department 2nd Bureau’s communication branch the military has promised to pay at most 40 000 Yuan for each port They also hope Shanghai Telecom will smoothly accomplish this task for the military based on the principle that national defense construction is important After checking the above areas’ channels our company has a relatively abundant inventory to satisfy the military’s request This is our suggestion because this is concerning defense construction and also the 3rd Department 2nd Bureau is a very important communication control department we agree to provide the requested channels according to the military’s suggested price Because this is a one-time payment and it is difficult to use the normal renting method we suggest our company accept one-time payment using the reason of “Military Co-Construction with China Telecom of Communication Channels” and provide from our inventory The military’s co-building does not interfere with our proprietary rights If something breaks the military is responsible to repair it and pay for the expenses After you agree with our suggestion we will sign an agreement with the communication branch of 61398 and implement it Please provide a statement about whether the above suggestion is appropriate or not Handwritten Note Agree with the Market Department Examining Control Affairs Division suggestion inside the agreement clearly define illegible both party’s responsibilities Figure 9 English Translation of China Telecom Memo Mandiant APT1 18 www mandiant com Synopsis of PLA Unit 61398  The evidence we have collected on PLA Unit 61398’s mission and infrastructure reveals an organization that »» Employs hundreds perhaps thousands of personnel »» Requires personnel trained in computer security and computer network operations »» Requires personnel proficient in the English language »» Has large-scale infrastructure and facilities in the “Pudong New Area” of Shanghai »» Was the beneficiary of special fiber optic communication infrastructure provided by state-owned enterprise China Telecom in the name of national defense The following sections of this report detail APT1’s cyber espionage and data theft operations The sheer scale and duration of these sustained attacks leave little doubt about the enterprise scale of the organization behind this campaign We will demonstrate that the nature of APT1’s targeted victims and the group’s infrastructure and tactics align with the mission and infrastructure of PLA Unit 61398 Mandiant APT1 19 www mandiant com Organizations compromised by APT1 over time 2006 AP T1 Ye a r s o f Es pio n a ge 2007 2008 2009 Our evidence indicates that APT1 has been stealing hundreds of terabytes of data from at least 141 organizations across a diverse set of industries beginning as early as 2006 Remarkably we have witnessed APT1 target dozens of organizations simultaneously Once the group establishes access to a victim’s network they continue to access it periodically over several months or years to steal large volumes of valuable intellectual property including technology blueprints proprietary manufacturing processes test results business plans pricing documents partnership agreements emails and contact lists from victim organizations’ leadership We believe that the extensive activity we have directly observed represents only a small fraction of the cyber espionage that APT1 has committed APT1 Puts the “Persistent” in APT 2010 2011 Since 2006 we have seen APT1 relentlessly expand its access to new victims Figure 10 shows the timeline of the 141 compromises we are aware of each marker in the figure represents a separate victim and indicates the earliest confirmed date of APT1 activity in that organization’s network 26 With the ephemeral nature of electronic evidence many of the dates of earliest known APT1 activity shown here underestimate the duration of APT1’s presence in the network Figure 10 Timeline showing dates of earliest known APT1 activity in the networks of the 141 organizations in which Mandiant has observed APT1 conducting cyber espionage 2012 Figure 10 shows that we have seen APT1 compromise an increasing number of organizations each year which may reflect an increase in APT1’s activity However this increase may also simply reflect Mandiant’s expanding visibility into APT1’s activities as the company has grown and victims’ awareness of cyber espionage activity in their networks has improved 26 2013 Mandiant APT1 20 www mandiant com Longest time period within which APT1 has continued to access a victim’s network 4 Years 10 Months Once APT1 has compromised a network they repeatedly monitor and steal proprietary data and communications from the victim for months or even years For the organizations in Figure 10 we found that APT1 maintained access to the victim’s network for an average of 356 days 27 The longest time period APT1 maintained access to a victim’s network was at least 1 764 days or four years and ten months APT1 was not continuously active on a daily basis during this time period however in the vast majority of cases we observed APT1 continued to commit data theft as long as they had access to the network APT1’s Geographic Industry Focus The organizations targeted by APT1 primarily conduct their operations in English However we have also seen the group target a small number of non-English speaking victims A full 87% of the APT1 victims we have observed are headquartered in countries where English is the native language see Figure 11 This includes 115 victims located in the U S and seven in Canada and the United Kingdom Of the remaining 19 victims 17 use English as a primary language for operations These include international cooperation and development agencies foreign governments in which English is one of multiple official languages and multinational conglomerates that primarily conduct their business in English Only two victims appear to operate using a language other than English Given that Englishlanguage proficiency is required for many members of PLA Unit 61398 we believe that the two non-English speaking victims are anomalies representing instances in which APT1 performed tasks outside of their normal activities This is based on 91 of the 141 victim organizations shown In the remaining cases APT1 activity is either ongoing or else we do not have visibility into the last known date of APT1 activity in the network 27 Mandiant APT1 21 www mandiant com OBSERVED GLOBAL APT1 ACTIVITY 1 Norway 2 Canada 5 United Kingdom 1 Belgium 1 Japan 1 Luxemborg 1 France 3 Israel 115 United States 2 Switzerland 1 UAE 3 India 2 Taiwan 2 Singapore 1 South Africa Figure 11 Geographic location of APT1’s victims In the case of victims with a multinational presence the location shown reflects either the branch of the organization that APT1 compromised when known or else is the location of the organization’s headquarters APT1 has demonstrated the capability and intent to steal from dozens of organizations across a wide range of industries virtually simultaneously Figure 12 provides a view of the earliest known date of APT1 activity against all of the 141 victims we identified organized by the 20 major industries they represent The results suggest that APT1’s mission is extremely broad the group does not target industries systematically but more likely steals from an enormous range of industries on a continuous basis Since the organizations included in the figure represent only the fraction of APT1 victims that we confirmed directly the range of industries that APT1 targets may be even broader than our findings suggest Further the scope of APT1’s parallel activities implies that the group has significant personnel and technical resources at its disposal In the first month of 2011 for example Figure 12 shows that APT1 successfully compromised 17 new victims operating in 10 different industries Since we have seen that the group remains active in each victim’s network for an average of nearly a year after the initial date of compromise we infer that APT1 committed these 17 new breaches while simultaneously maintaining access to and continuing to steal data from a number of previously compromised victims Mandiant APT1 22 www mandiant com TIMELINE OF APT1 COMPROMISES BY INDUSTRY SECTOR 2006 2007 2008 2009 2010 2011 2012 Information Technology Transportation High-Tech Electronics Financial Services Navigation Legal Services Engineering Services Media Advertising and Entertainment Food and Agriculture Satellites and Telecommunications Chemicals Energy International Organizations Scientific Research and Consulting Public Administration Construction and Manufacturing Aerospace Education Healthcare Metals and Mining Figure 12 Timeframe of APT1’s cyber espionage operations against organizations by industry The dots within each bar represent the earliest known date on which APT1 compromised a new organization within the industry Mandiant APT1 23 www mandiant com We believe that organizations in all industries related to China’s strategic priorities are potential targets of APT1’s comprehensive cyber espionage campaign While we have certainly seen the group target some industries more heavily than others see Figure 13 our observations confirm that APT1 has targeted at least four of the seven strategic emerging industries that China identified in its 12th Five Year Plan 28 0 5 10 15 20 0 5 10 15 20 Information Technology Aerospace Public Administration Satellites and Telecommunications Scientific Research and Consulting Energy Transportation Construction and Manufacturing International Organizations Engineering Services High-tech Electronics Legal Services Media Advertising and Entertainment Navigation Chemicals Financial Services Food and Agriculture Metals and Mining Healthcare Education Industries Compromised by APT1 Figure 13 Number of APT1 victims by industry We determined each organization’s industry based on reviewing its industry classification in the Hoover’s29 system We also considered the content of the data that APT1 stole in each case to the extent that this information was available Joseph Casey and Katherine Koleski Backgrounder China’s 12th Five-Year Plan U S -China Economic Security Review Commission 2011 19 http www uscc gov researchpapers 2011 12th-FiveYearPlan_062811 pdf accessed February 3 2013 28 29 http www hoovers com Mandiant APT1 24 www mandiant com APT1 Data Theft APT1 steals a broad range of information from its victims The types of information the group has stolen relate to »» product development and use including information on test results system designs product manuals parts lists and simulation technologies »» manufacturing procedures such as descriptions of proprietary processes standards and waste management processes »» business plans such as information on contract negotiation positions and product pricing legal events mergers joint ventures and acquisitions »» policy positions and analysis such as white papers and agendas and minutes from meetings involving highranking personnel »» emails of high-ranking employees and »» user credentials and network architecture information It is often difficult for us to estimate how much data APT1 has stolen during their intrusions for several reasons »» APT1 deletes the compressed archives after they pilfer them leaving solely trace evidence that is usually overwritten during normal business activities »» Pre-existing network security monitoring rarely records or identifies the data theft »» The duration of time between the data theft and Mandiant’s investigation is often too great and the trace evidence of data theft is overwritten during the normal course of business »» Some victims are more intent on assigning resources to restore the security of their network in lieu of investigating and understanding the impact of the security breach Even with these challenges we have observed APT1 steal as much as 6 5 terabytes of compressed data from a single organization over a ten-month time period Given the scope of APT1’s operations including the number of organizations and industries we have seen them target along with the volume of data they are clearly capable of stealing from any single organization APT1 has likely stolen hundreds of terabytes from its victims Although we do not have direct evidence indicating who receives the information that APT1 steals or how the recipient processes such a vast volume of data we do believe that this stolen information can be used to obvious advantage by the PRC and Chinese state-owned enterprises As an example in 2008 APT1 compromised the network of a company involved in a wholesale industry APT1 6 5 Terabytes installed tools to create compressed file archives and to extract emails and attachments Over the following 2 5 years APT1 stole an unknown number of over 10 months files from the victim and repeatedly accessed the email accounts of several executives including the CEO and General Counsel During this same time period major news organizations reported that China had successfully negotiated a double-digit decrease in price per unit with the victim organization for one of its major commodities This may be coincidental however it would be surprising if APT1 could continue perpetrating such a broad mandate of cyber espionage and data theft if the results of the group’s efforts were not finding their way into the hands of entities able to capitalize on them Largest APT1 data theft from a single organization Mandiant APT1 25 www mandiant com APT1 In The News Public reporting corroborates and extends our observations of APT1’s cyber espionage activity However several factors complicate the process of compiling and synthesizing public reports on APT1 For one thing information security researchers and journalists refer to APT1 by a variety of names In addition many cyber security analysts focus on writing about tools that are shared between multiple Chinese APT groups without differentiating between the various actors that use them To assist researchers in identifying which public reports describe the threat group that we identify as APT1 Table 3 provides a list of APT group nicknames that frequently appear in the media and differentiates between those that describe APT1 and those that do not In addition below is a list of public reports about Chinese threat actors that we have confirmed as referring to APT1 »» The earliest known public report about APT1 infrastructure is a 2006 publication from the Japanese division of Symantec 30 The report calls out the hostname sb hugesoft org which is registered to an APT1 persona known as Ugly Gorilla discussed later in this report »» In September 2012 Brian Krebs of the “Krebs on Security” cybercrime blog reported on a security breach at Telvent Canada Ltd now Schneider Electric which we attributed to APT1 based on the tools and infrastructure that the hackers used to exploit and gain access to the system 31 Table 3 Identifying APT1 Nicknames in the News Nickname Verdict Comment Crew Confirmed APT1 Comment Group Confirmed APT1 Shady Rat Possibly APT1 not confirmed Nitro Attacks Not APT1 Attributed to another tracked APT group Elderwood Not APT1 Attributed to another tracked APT group Sykipot Not APT1 Attributed to another tracked APT group Aurora Not APT1 Attributed to another tracked APT group Night Dragon Not APT1 Attributed to another tracked APT group »» A SCADA security company by the name of Digital Bond published a report of spear phishing against its company in June 2012 32 AlienVault provided analysis on the associated malware 33 Indicators included in the report have been attributed as part of APT1 infrastructure »» In November 2012 Bloomberg’s Chloe Whiteaker authored a piece on a Chinese threat group called “Comment Group ” which described the various tools and domains used by APT1 persona Ugly Gorilla 34 Symantec “Backdoor Wualess ” Symantec Security Response 2007 http www symantec com ja jp security_response print_writeup jsp docid 2006-101116-1723-99 accessed February 3 2013 30 Brian Krebs “Chinese Hackers Blamed for Intrusion at Energy Industry Giant Telvent ” Krebs on Security 2012 http krebsonsecurity com 2012 09 chinese-hackers-blamed-for-intrusion-at-energy-industry-giant-telvent accessed February 3 2013 31 Reid Wightman “Spear Phishing Attempt ” Digital Bond 2012 https www digitalbond com blog 2012 06 07 spear-phishing-attempt accessed February 3 2013 32 Jaime Blasco “Unveiling a spearphishing campaign and possible ramifications ” Alien Vault 2012 http labs alienvault com labs index php 2012 unveiling-a-spearphishing-campaign-and-possible-ramifications accessed February 3 2013 33 Chloe Whiteaker “Following the Hackers’ Trail ” Bloomberg 2012 http go bloomberg com multimedia following-hackers-trail accessed February 3 2013 34 Mandiant APT1 26 www mandiant com A P T 1 At ta ck Life cy cle APT1 has a well-defined attack methodology honed over years and designed to steal massive quantities of intellectual property They begin with aggressive spear phishing proceed to deploy custom digital weapons and end by exporting compressed bundles of files to China – before beginning the cycle again They employ good English — with acceptable slang — in their socially engineered emails They have evolved their digital weapons for more than seven years resulting in continual upgrades as part of their own software release cycle Their ability to adapt to their environment and spread across systems makes them effective in enterprise environments with trust relationships These attacks fit into a cyclic pattern of activity that we will describe in this section within the framework of Mandiant’s Attack Lifecycle model In each stage we will discuss APT1’s specific techniques to illustrate their tenacity and the scale at which they operate See Appendix B “APT and the Attack Lifecycle” for a high-level overview of the steps most APT groups take in each stage of the Attack Lifecycle Maintain Presence Initial Recon Initial Compromise Establish Foothold Escalate Privileges Move Laterally Internal Recon Complete Mission Figure 14 Mandiant’s Attack Lifecycle Model Mandiant APT1 27 www mandiant com The Initial Compromise The Initial Compromise represents the methods intruders use to first penetrate a target organization’s network As with most other APT groups spear phishing is APT1’s most commonly used technique The spear phishing emails contain either a malicious attachment or a hyperlink to a malicious file The subject line and the text in the email body are usually relevant to the recipient APT1 also creates webmail accounts using real peoples’ names — names that are familiar to the recipient such as a colleague a company executive an IT department employee or company counsel — and uses these accounts to send the emails As a real-world example this is an email that APT1 sent to Mandiant employees Date Wed 18 Apr 2012 06 31 41 -0700 From Kevin Mandia kevin mandia@rocketmail com Subject Internal Discussion on the Press Release Hello Shall we schedule a time to meet next week We need to finalize the press release Details click here Kevin Mandia Figure 15 APT1 Spear Phishing Email At first glance the email appeared to be from Mandiant’s CEO Kevin Mandia However further scrutiny shows that the email was not sent from a Mandiant email account but from “kevin mandia@rocketmail com” Rocketmail is a free webmail service The account “kevin mandia@rocketmail com” does not belong to Mr Mandia Rather an APT1 actor likely signed up for the account specifically for this spear phishing event If anyone had clicked on the link that day which no one did thankfully their computer would have downloaded a malicious ZIP file named “Internal_ Discussion_Press_Release_In_Next_Week8 zip” This file contained a malicious executable that installs a custom APT1 backdoor that we call WEBC2-TABLE Mandiant APT1 28 www mandiant com Although the files that APT1 actors attach or link to spear phishing emails are not always in ZIP format this is the predominant trend we have observed in the last several years Below is a sampling of file names that APT1 has used with their malicious ZIP files 2012ChinaUSAviationSymposium zip Employee-Benefit-and-Overhead-Adjustment-Keys zip MARKET-COMMENT-Europe-Ends-Sharply-Lower-On-Data-Yields-Jump zip Negative_Reports_Of_Turkey zip New_Technology_For_FPGA_And_Its_Developing_Trend zip North_Korean_launch zip Oil-Field-Services-Analysis-And-Outlook zip POWER_GEN_2012 zip Proactive_Investors_One2One_Energy_Investor_Forum zip Social-Security-Reform zip South_China_Sea_Security_Assessment_Report zip Telephonics_Supplier_Manual_v3 zip The_Latest_Syria_Security_Assessment_Report zip Updated_Office_Contact_v1 zip Updated_Office_Contact_v2 zip Welfare_Reform_and_Benefits_Development_Plan zip What’s this email The example file names include military economic and diplomatic themes suggesting the wide range of industries that APT1 targets Some names are also generic e g “updated_office_contact_v1 zip” and could be used for targets in any industry @ Spear Phishing Email with Attachment APT 1 Is this for real @ APT 1 On some occasions unsuspecting email recipients have replied to the spear phishing messages believing they were communicating with their acquaintances In one case a person replied “I’m not sure if this is legit so I didn’t open it ” Within 20 minutes someone in APT1 responded with a terse email back “It’s legit ” Okay thanks “It’s legit ” @ APT 1 Figure 16 APT1’s interaction with a spear phishing recipient Mandiant APT1 29 www mandiant com Would you click on this Some APT1 actors have gone to the trouble of making the malicious software inside their ZIP files look like benign Adobe PDF files Here is an example This is not a PDF file It looks like the filename has a PDF extension but the file name actually includes 119 spaces after “ pdf” followed by “ exe” — the real file extension APT1 even went to the trouble of turning the executable’s icon to an Adobe symbol to complete the ruse However this file is actually a dropper for a custom APT1 backdoor that we call WEBC2-QBP Establishing A Foothold Establishing a foothold involves actions that ensure control of the target network’s systems from outside the network APT1 establishes a foothold once email recipients open a malicious file and a backdoor is subsequently installed A backdoor is software that allows an intruder to send commands to the system remotely In almost every case APT backdoors initiate outbound connections to the intruder’s “command and control” C2 server APT intruders employ this tactic because while network firewalls are generally adept at keeping malware outside the network from initiating communication with systems inside the network they are less reliable at keeping malware that is already inside the network from communicating to systems outside 110001100100011010100 1001100100011010100 10010100101 C2 Figure 17 Backdoors installed on compromised systems usually initiate connections with C2 servers While APT1 intruders occasionally use publicly available backdoors such as Poison Ivy and Gh0st RAT the vast majority of the time they use what appear to be their own custom backdoors We have documented 42 families of backdoors in “Appendix C The Malware Arsenal” that APT1 uses that we believe are not publicly available In addition we have provided 1 007 MD5 hashes associated with APT1 malware in Appendix E We will describe APT1’s backdoors in two categories “Beachhead Backdoors” and “Standard Backdoors ” Mandiant APT1 30 www mandiant com Beachhead Backdoors Beachhead backdoors are typically minimally featured They offer the attacker a toe-hold to perform simple tasks like retrieve files gather basic system information and trigger the execution of other more significant capabilities such as a standard backdoor What is a malware family A malware family is a collection of malware in which each sample shares a significant amount of code with all of the others To help illustrate this consider the following example from the physical world There is now a vast array of computing tablets for sale These include Apple’s iPad Samsung’s Galaxy Tab and Microsoft’s Surface Although these are all tablet computers “under the hood” they are probably quite different However one can expect that an iPad 1 and an iPad 2 share a significant number of components — much more than say an iPad 1 and a Microsoft Surface Thus it makes sense to refer to the iPad “family” and the Surface “family” APT1’s beachhead backdoors are usually what we call WEBC2 backdoors WEBC2 backdoors are probably the most well-known kind of APT1 backdoor and are the reason why some security companies refer to APT1 as the “Comment Crew ” A WEBC2 backdoor is designed to retrieve a webpage from a C2 When it comes to computer programs in general if they server It expects the webpage to contain share more than 80% of the same code we consider them special HTML tags the backdoor will attempt part of the same family There are exceptions for example to interpret the data between the tags as some files contain public and standard code libraries that commands Older versions of WEBC2 read we do not take into consideration when making a family data between HTML comments though over determination time WEBC2 variants have evolved to read data contained within other types of tags From direct observation we can confirm that APT1 was using WEBC2 backdoors as early as July 2006 However the first compile time35 we have for WEBC2-KT3 is 2004-01-23 suggesting that APT1 has been crafting WEBC2 backdoors since early 2004 Based on the 400 samples of WEBC2 variants that we have accumulated it appears that APT1 has direct access to developers who have continually released new WEBC2 variants for over six years For example these two build paths which were discovered inside WEBC2-TABLE samples help to illustrate how APT1 has been steadily building new WEBC2 variants as part of a continuous development process Sample A WEBC2 families MD5 d7aa32b7465f55c368230bb52d52d885 Compile date 2012-02-23 work code 2008-7-8muma mywork winInet_ winApplication2009-8-7 mywork aaaaaaa2012-2-23 Release aaaaaaa pdb Sample B MD5 c1393e77773a48b1eea117a302138554 Compile date 2009-08-07 D work code 2008-7-8muma mywork winInet_ winApplication2009-8-7 mywork aaaaaaa Release aaaaaaa pdb WEBC2-AUSOV WEBC2-ADSPACE WEBC2-BOLID WEBC2-CLOVER WEBC2-CSON WEBC2-DIV WEBC2-GREENCAT WEBC2-HEAD WEBC2-KT3 WEBC2-QBP WEBC2-RAVE WEBC2-TABLE WEBC2-TOCK WEBC2-UGX WEBC2-YAHOO WEBC2-Y21K … and many still uncategorized “Compile” refers to the process of transforming a programmer’s source code into a file that a computer can understand and execute The compile date is easily accessible in the PE header of the resulting executable file unless the intruder takes additional steps to obfuscate it 35 Mandiant APT1 31 www mandiant com A “build path” discloses the directory from which the programmer built and compiled his source code These samples compiled 2 5 years apart were compiled within a folder named “work code mywork” The instances of “work” suggest that working on WEBC2 is someone’s day job and not a side project or hobby Furthermore the Sample A build string includes “2012-2-23” — which matches Sample A’s compile date The Sample B build string lacks “2012-2-23” but includes “2009-8-7” — which also matches Sample B’s compile date This suggests that the code used to compile Sample A was modified from code that was used to compile Sample B 2 5 years previously The existence of “2008-7-8” suggests that the code for both samples was modified from a version that existed in July 2008 a year before Sample B was created This series of dates indicates that developing and modifying the WEBC2 backdoor is an iterative and long-term process APT 1 MALWARE FAMILIES FIRST KNOWN COMPILE TIMES 2004 WEBC2 KT3 2005 GETMAIL 2006 WEBC2 backdoors typically give APT1 attackers a short and rudimentary set of commands to issue to victim systems including »» Open an interactive command shell usually Windows’ cmd exe »» Download and execute a file »» Sleep i e remain inactive for a specified amount of time WEBC2 backdoors are often packaged with spear phishing emails Once installed APT1 intruders have the option to tell victim systems to download and execute additional malicious software of their choice WEBC2 backdoors work for their intended purpose but they generally have fewer features than the “Standard Backdoors” described below LIGHTDART MAPIGET 2007 WEBC2 Y21K WEBC2 UGX 2008 TARSIP MANITSME STARSYPOUND DAIRY SWORD HELAUTO Standard Backdoors The standard non-WEBC2 APT1 backdoor typically communicates using the HTTP protocol to blend in with legitimate web traffic or a custom protocol that the malware authors designed themselves These backdoors give APT intruders a laundry list of ways to control victim systems including »» Create modify delete execute programs »» Upload download files »» Create delete directories »» List start stop processes »» Modify the system registry »» Take screenshots of the user’s desktop »» Capture keystrokes »» Capture mouse movement »» Start an interactive command shell »» Create a Remote desktop i e graphical interface »» Harvest passwords »» Enumerate users »» Enumerate other systems on the network »» Sleep i e go inactive for a specified amount of time »» Log off the current user »» Shut down the system Mandiant APT1 BISCUIT 32 HACKSFASE AURIGA 2009 GREENCAT GOGGLES WEBC2 RAVE WEBC2 ADSPACE 2010 WEBC2 AUSOV WEBC2 CLOVER MACROMAIL NEWSREELS WEBC2 HEAD BANGAT LONGRUN SEASALT WEBC2 TOCK WARP WEBC2 QBP WEBC2 YAHOO TABMSGSQL WEBC2 CSON 2011 WEBC2 DIV LIGHTBOLT GDOCUPLOAD COMBOS COOKIEBAG GLOOXMAIL MINIASP 2012 KURTON BOUNCER CALENDAR WEBC2 TABLE WEBC2 BOLID www mandiant com The BISCUIT backdoor so named for the command “bdkzt” is an illustrative example of the range of commands that APT1 has built into its “standard” backdoors APT1 has used and steadily modified BISCUIT since as early as 2007 and continues to use it presently Table 4 A subset of BISCUIT commands Command Description bdkzt Launch a command shell ckzjqk Get system information download file Transfer a file from the C2 server exe file user Launch a program as a specific user exit Close the connection and sleep lists type List servers on a Windows network ljc Enumerate running processes and identify their owners sjc PID NAME Terminate a process either by process ID or by process name upload file Send a file to the C2 server zxdosml input Send input to the command shell process launched with “bdkzt” These functions are characteristic of most backdoors and are not limited to APT1 or even APT For example anyone who wants to control a system remotely will likely put functions like “Upload download files” into a backdoor Covert Communications Some APT backdoors attempt to mimic legitimate Internet traffic other than the HTTP protocol APT1 has created a handful of these including Table 5 Backdoors that mimic legitimate communication protocols Backdoor Mimicked protocol MACROMAIL MSN Messenger GLOOXMAIL Jabber XMPP CALENDAR Gmail Calendar When network defenders see the communications between these backdoors and their C2 servers they might easily dismiss them as legitimate network traffic Additionally many of APT1’s backdoors use SSL encryption so that communications are hidden in an encrypted SSL tunnel We have provided APT1’s public SSL certificates in Appendix F so people can incorporate them into their network signatures Mandiant APT1 33 www mandiant com Privilege Escalation Escalating privileges involves acquiring items most often usernames and passwords that will allow access to more resources within the network In this and the next two stages APT1 does not differ significantly from other APT intruders or intruders generally APT1 predominantly uses publicly available tools to dump password hashes from victim systems in order to obtain legitimate user credentials APT1 has used these privilege escalation tools Table 6 Publicly available privilege escalation tools that APT1 has used Tool Description Website cachedump This program extracts cached password hashes from a system’s registry Currently packaged with fgdump below fgdump Windows password hash dumper http www foofus net fizzgig fgdump gsecdump Obtains password hashes from the Windows registry including the SAM file cached domain credentials and LSA secrets http www truesec se lslsass Dump active logon session password hashes from the lsass process http www truesec se mimikatz A utility primarily used for dumping password hashes http blog gentilkiwi com mimikatz pass-the-hash toolkit Allows an intruder to “pass” a password hash without knowing the original password to log in to systems http oss coresecurity com projects pshtoolkit htm pwdump7 Dumps password hashes from the Windows registry http www tarasco org security pwdump_7 pwdumpX Dumps password hashes from the Windows registry The tool claims its origin as http reedarvin thearvins com but the site is not offering this software as of the date of this report Mandiant APT1 34 www mandiant com What is a password hash When a person logs in to a computer website email server or any networked resource requiring a password the supplied password needs to be verified One way to do this would be to store the person’s actual password on the system that the person is trying to access and to compare the typed password to the stored password Although simple this method is also very insecure anyone who can access that same system will be able to see the person’s password Instead systems that verify passwords usually store password hashes In simple terms a password hash is a number that is mathematically generated from the person’s password The mathematical methods algorithms used to generate password hashes will create values that are unique for all practical purposes When a person supplies their password the computer generates a hash of the typed password and compares it to the stored hash If they match the passwords are presumed to be the same and the person is allowed to log in It is supposed to be impossible to “reverse” a hash to obtain the original password However it is possible with enough computational resources to “crack” password hashes to discover the original password “Cracking” generally consists of guessing a large number of passwords hashing them and comparing the generated hashes to the existing hashes to see if any match Intruders will steal password hashes from victim systems in hopes that they can either use the hashes as-is by “passing-the-hash” or crack them to discover users’ passwords Internal Reconnaissance In the Internal Reconnaissance stage the intruder collects information about the victim environment Like most APT and non-APT intruders APT1 primarily uses built-in operating system commands to explore a compromised system and its networked environment Although they usually simply type these commands into a command shell sometimes intruders may use batch scripts to speed up the process Figure 18 below shows the contents of a batch script that APT1 used on at least four victim networks @echo off ipconfig all ”C WINNT Debug 1 txt” net start ”C WINNT Debug 1 txt” tasklist v ”C WINNT Debug 1 txt” net user ”C WINNT Debug 1 txt” net localgroup administrators ”C WINNT Debug 1 txt” netstat -ano ”C WINNT Debug 1 txt” net use ”C WINNT Debug 1 txt” net view ”C WINNT Debug 1 txt” net view domain ”C WINNT Debug 1 txt” net group domain ”C WINNT Debug 1 txt” net group “domain users” domain ”C WINNT Debug 1 txt” net group “domain admins” domain ”C WINNT Debug 1 txt” net group “domain controllers” domain ”C WINNT Debug 1 txt” net group “exchange domain servers” domain ”C WINNT Debug 1 txt” net group “exchange servers” domain ”C WINNT Debug 1 txt” net group “domain computers” domain ”C WINNT Debug 1 txt” Figure 18 An APT1 batch script that automates reconnaissance Mandiant APT1 35 www mandiant com This script performs the following functions and saves the results to a text file »» Display the victim’s network configuration information »» List the services that have started on the victim system »» List currently running processes »» List accounts on the system »» List accounts with administrator privileges »» List current network connections »» List currently connected network shares »» List other systems on the network »» List network computers and accounts according to group “domain controllers ” “domain users ” “domain admins ” etc Lateral Movement Once an APT intruder has a foothold inside the network and a set of legitimate credentials 36 it is simple for the intruder to move around the network undetected »» They can connect to shared resources on other systems »» They can execute commands on other systems using the publicly available “psexec” tool from Microsoft Sysinternals or the built-in Windows Task Scheduler “at exe” These actions are hard to detect because legitimate system administrators also use these techniques to perform actions around the network Maintain Presence In this stage the intruder takes actions to ensure continued long-term control over key systems in the network environment from outside of the network APT1 does this in three ways 1 Install new backdoors on multiple systems Throughout their stay in the network which could be years APT1 usually installs new backdoors as they claim more systems in the environment Then if one backdoor is discovered and deleted they still have other backdoors they can use We usually detect multiple families of APT1 backdoors scattered around a victim network when APT1 has been present for more than a few weeks 2 Use legitimate VPN credentials APT actors and hackers in general are always looking for valid credentials in order to impersonate a legitimate user We have observed APT1 using stolen usernames and passwords to log into victim networks’ VPNs when the VPNs are only protected by single-factor authentication From there they are able to access whatever the impersonated users are allowed to access within the network 36 Mandiant uses the term “credentials” to refer to a userid and its corresponding working password Mandiant APT1 36 www mandiant com 3 Log in to web portals Once armed with stolen credentials APT1 intruders also attempt to log into web portals that the network offers This includes not only restricted websites but also web-based email systems such as Outlook Web Access Completing The Mission Similar to other APT groups we track once APT1 finds files of interest they pack them into archive files before stealing them APT intruders most commonly use the RAR archiving utility for this task and ensure that the archives are password protected Sometimes APT1 intruders use batch scripts to assist them in the process as depicted in Figure 19 The instances of “XXXXXXXX” obfuscate the text that was in the actual batch script @echo off cd d c windows tasks rar log a XXXXXXXX rar -v200m “C Documents and Settings Place My Documents XXXXXXXX” -hpsmy123 @# del vbs del %0 Figure 19 An APT1 batch script that bundles stolen files into RAR archive files After creating files compressed via RAR the APT1 attackers will transfer files out of the network in ways that are consistent with other APT groups including using the File Transfer Protocol FTP or their existing backdoors Many times their RAR files are so large that the attacker splits them into chunks before transferring them Figure 19 above shows a RAR command with the option “-v200m” which means that the RAR file should be split up into 200MB portions rar Figure 20 APT1 bundles stolen files into RAR archives before moving data to China Mandiant APT1 37 www mandiant com Unlike most other APT groups we track APT1 uses two email-stealing utilities that we believe are unique to APT1 The first GETMAIL was designed specifically to extract email messages attachments and folders from within Microsoft Outlook archive “PST” files Microsoft Outlook archives can be large often storing years’ worth of emails They may be too large to transfer out of a network quickly and the intruder may not be concerned about stealing every email The GETMAIL utility allows APT1 intruders the flexibility to take only the emails between dates of their choice In one case we observed an APT1 intruder return to a compromised system once a week for four weeks in a row to steal only the past week’s emails Whereas GETMAIL steals email in Outlook archive files the second utility MAPIGET was designed specifically to steal email that has not yet been archived and still resides on a Microsoft Exchange Server In order to operate successfully MAPIGET requires username password combinations that the Exchange server will accept MAPIGET extracts email from specified accounts into text files for the email body and separate attachments if there are any English As A Second Language APT1’s “It’s legit” email should not mislead someone into thinking that APT1 personnel are all fluent in English though some undoubtedly are Their own digital weapons betray the fact that they were programmed by people whose first language is not English Here are some examples of grammatically incorrect phrases that have made it into APT1’s tools over the years Table 7 Examples of grammatically incorrect phrases in APT1 malware Phrase Tool Compile date If use it key is the KEY GETMAIL 2005-08-18 Wether encrypt or not Default is NOT GETMAIL 2005-08-18 ToolHelp API isn’t support on NT versions prior to Windows 2000 LIGHTDART 2006-08-03 No Doubt to Hack You Writed by UglyGorilla MANITSME 2007-09-06 Type command disable Go on HELAUTO 2008-06-16 File no exist Simple Downloader not profiled 2008-11-26 you specify service name not in Svchost netsvcs must be one of following BISCUIT 2009-06-02 Can not found the PID WEBC2 Uncat 2009-08-11 Doesn’t started GREENCAT 2009-08-18 Exception Catched MACROMAIL 2010-03-15 Are you sure to FORMAT Disk C With NTFS Y N TABMSGSQL 2010-11-04 Shell is not exist or stopped TARSIP 2011-03-24 Reqfile not exist COOKIEBAG 2011-10-12 the url no respon COOKIEBAG 2011-10-12 Fail To Execute The Command WEBC2-TABLE 2012-02-23 Mandiant APT1 38 www mandiant com A P T 1 I nfr a s t r u ct u r e APT1 maintains an extensive infrastructure of computers around the world We have evidence suggesting that APT1 manually controls thousands of systems in support of their attacks and have directly observed their control over hundreds of these systems Although they control systems in dozens of countries their attacks originate from four large networks in Shanghai — two of which are allocated directly to the Pudong New Area the home of Unit 61398 The sheer number of APT1 IP addresses concentrated in these Shanghai ranges coupled with Simplified Chinese keyboard layout settings on APT1’s attack systems betrays the true location and language of the operators To help manage the vast number of systems they control APT1 has registered hundreds of domain names the majority of which also point to a Shanghai locale The domain names and IP addresses together comprise APT1’s command and control framework which they manage in concert to camouflage their true origin from their English speaking targets APT1 Network Origins We are frequently asked why it is an ineffective security measure to just block all IP addresses in China from connecting to your network To put it simply it is easy for APT1 attackers to bounce or “hop” through intermediary systems such that they almost never connect to a victim network directly from their systems in Shanghai Using their immense infrastructure they are able to make it appear to victims that an attack originates from almost any country they choose The systems in this type of network redirection infrastructure have come to be called “hop points” or “hops ” Hop points are most frequently compromised systems that APT1 uses in some instances for years as camouflage for their attacks without the knowledge of the systems’ owners These systems belong to third-party victims who are compromised for access to infrastructure as opposed to direct victims who are compromised for their data and intellectual property Figure 21 APT1 bounces through “hop point” systems before accessing victim systems Mandiant APT1 39 www mandiant com We have observed some of APT1’s activities after they cross into virtual U S territory They access hop points using a variety of techniques the most popular being Remote Desktop and FTP Over a two-year period January 2011 to January 2013 we confirmed 1 905 instances of APT1 actors logging into their hop infrastructure from 832 different IP addresses with Remote Desktop Remote Desktop provides a remote user with an interactive graphical interface to a system The experience is similar to the user actually physically sitting at the system and having direct access to the desktop keyboard and mouse Of the 832 IP addresses 817 98 2% were Chinese and belong predominantly to four large net blocks in Shanghai which we will refer to as APT1’s home networks Table 8 Net blocks corresponding to IP addresses that APT1 used to access their hop points Number Net block Registered Owner 445 223 166 0 0 - 223 167 255 255 China Unicom Shanghai Network 217 58 246 0 0 - 58 247 255 255 China Unicom Shanghai Network 114 112 64 0 0 - 112 65 255 255 China Unicom Shanghai Network 12 139 226 0 0 - 139 227 255 255 China Unicom Shanghai Network 1 114 80 0 0 - 114 95 255 255 China Telecom Shanghai Network 1 101 80 0 0 - 101 95 255 255 China Telecom Shanghai Network 27 Other non-Shanghai Chinese IPs Notably the registration information for the second and third net blocks above includes this contact information at the end person nic-hdl e-mail address phone fax-no country yanling ruan YR194-AP sh-ipmaster@chinaunicom cn No 900 Pudong Avenue ShangHai China 086-021-61201616 086-021-61201616 cn The registration information for these two net blocks suggests that they serve the Pudong New Area of Shanghai where PLA Unit 61398 is headquartered The other 15 of the 832 IP addresses are registered to organizations in the U S 12 Taiwan 1 Japan 1 and Korea 1 We have confirmed that some of these systems are part of APT1’s hop infrastructure and not legitimately owned by APT1 — in other words APT1 accessed one hop from another hop as opposed to accessing the hop directly from Shanghai In order to make a user’s experience as seamless as possible the Remote Desktop protocol requires client applications to forward several important details to the server including their client hostname and the client keyboard layout In 1 849 of the 1 905 97% APT1 Remote Desktop sessions we observed in the past two years the keyboard layout setting was “Chinese Simplified — US Keyboard ” Microsoft’s Remote Desktop client configures this setting automatically based on the selected language on the client system making it nearly certain that the APT1 actors managing the hop infrastructure are doing so with Simplified Chinese zh-cn input settings “Simplified Chinese” is a streamlined set of the traditional Chinese characters that have been in use since the 1950s originating in mainland China Taiwan and municipalities such as Hong Kong still use “Traditional Chinese” zh-tw character sets The overwhelming concentration of Shanghai IP addresses and Simplified Chinese language settings clearly indicate that APT1 intruders are mainland Chinese speakers with ready access to large networks in Shanghai The only Mandiant APT1 40 www mandiant com alternative is that APT1 has intentionally been conducting a years-long deception campaign to impersonate Chinese speakers from Shanghai in places where victims are not reasonably expected to have any visibility – and without making a single mistake that might indicate their “true” identity Interaction with Backdoors As we just mentioned APT1 attackers typically use hops to connect to and control victim systems Victim backdoors regularly connect out to hop points waiting for the moment that the attacker is there to give them commands However exactly how this works is often specific to the tools they are using Manual WEBC2 updates As covered in the previous “Attack Lifecycle” section WEBC2 backdoor variants download and interpret data stored between tags in HTML pages as commands They usually download HTML pages from a system within APT1’s hop infrastructure We have observed APT1 intruders logging in to WEBC2 servers and manually editing the HTML pages that backdoors will download Because the commands are usually encoded and difficult to spell from memory APT1 intruders typically do not type these strings but instead copy and paste them into the HTML files They likely generate the encoded commands on their own systems before pasting them in to an HTML file hosted by the hop point For example we observed an APT attacker pasting the string “czo1NA ” into an HTML page That string is the base64encoded version of “s 54” meaning “sleep for 54 minutes” or hours depending on the particular backdoor In lieu of manually editing an HTML file on a hop point we have also observed APT1 intruders uploading new already-edited HTML files HTRAN When APT1 attackers are not using WEBC2 they require a “command and control” C2 user interface so they can issue commands to the backdoor This interface sometimes runs on their personal attack system which is typically in Shanghai In these instances when a victim backdoor makes contact with a hop the communications need to be forwarded from the hop to the intruder’s Shanghai system so the backdoor can talk to the C2 server software We have observed 767 separate instances in which APT1 intruders used the publicly available “HUC Packet Transmit Tool” or HTRAN on a hop As always keep in mind that these uses are confirmed uses and likely represent only a small fraction of APT1’s total activity The HTRAN utility is merely a middle-man facilitating connections between the victim and the attacker who is using the hop point 0101010001 0100100001 HTRAN 0101010001 C2 0100100001 Figure 22 The HTRAN tool resides on APT1 hop points and acts as a middle-man Mandiant APT1 41 www mandiant com Typical use of HTRAN is fairly simple the attacker must specify the originating IP address of his or her workstation in Shanghai and a port on which to accept connections For example the following command which was issued by an APT1 actor will listen for incoming connections on port 443 on the hop and automatically proxy them to the Shanghai IP address 58 247 242 254 on port 443 htran -tran 443 58 247 242 254 443 In the 767 observed uses of HTRAN APT1 intruders supplied 614 distinct routable IP addresses In other words they used their hops to function as middlemen between victim systems and 614 different addresses Of these addresses 613 of 614 are part of APT1’s home networks Table 9 Net blocks corresponding to IP addresses used to receive HTRAN communications Number Net block Registered Owner 340 223 166 0 0 - 223 167 255 255 China Unicom Shanghai Network 160 58 246 0 0 - 58 247 255 255 China Unicom Shanghai Network 102 112 64 0 0 - 112 65 255 255 China Unicom Shanghai Network 11 139 226 0 0 - 139 227 255 255 China Unicom Shanghai Network 1 143 89 0 0 - 143 89 255 255 Hong Kong University of Science and Technology C2 Server Software on Hop Infrastructure Occasionally APT1 attackers have installed C2 server components on systems in their hop infrastructure rather than forwarding connections back to C2 servers in Shanghai In these instances they do not need to use a proxy tool like HTRAN to interact with victim systems However it does mean that the intruders need to be able to interface with the often graphical C2 server software running on the hop We have observed APT1 intruders log in to their hop point start the C2 server wait for incoming connections and then proceed to give commands to victim systems WEBC2 variants may include a server component that provides a simple C2 interface to the intruder This saves the intruder from having to manually edit webpages That is this server component receives connections from victim backdoors displays them to the intruder and then translates the intruder’s commands into HTML tags that the victim backdoors read Mandiant APT1 42 www mandiant com APT1 Servers In the last two years alone we have confirmed 937 APT1 C2 servers — that is actively listening or communicating programs — running on 849 distinct IP addresses However we have evidence to suggest that APT1 is running hundreds and likely thousands of other servers see the Domains section below The programs acting as APT1 servers have mainly been 1 FTP for transferring files 2 web primarily for WEBC2 3 RDP for remote graphical control of a system 4 HTRAN for proxying and 5 C2 servers associated with various backdoor families covered in Appendix C The Malware Arsenal Global distribution of confirmed APT1 servers Taiwan 6 Canada 3 Australia 2 Mexico 2 Norway 2 Belgium 1 Denmark 1 Indonesia 1 India 1 Singapore 1 South Korea 11 US 109 China 709 Distribution of confirmed APT1 servers in China 139 226 0 0 - 139 227 255 255 19 Shanghai Other 11 including 7 in Hong Kong 112 64 0 0 - 112 65 255 255 93 Shanghai 58 246 0 0 - 58 247 255 255 180 Shanghai 223 166 0 0 - 223 167 255 255 406 Shanghai Figure 23 The global distribution of confirmed APT1 servers Mandiant APT1 43 www mandiant com Domain Names The Domain Name System DNS is the phone book of the Internet In the same way that people program named contacts into their cell phones and no longer need to remember phone numbers DNS allows people to remember names like “google com” instead of IP addresses When a person types “google com” into a web browser a DNS translation to an IP address occurs so that the person’s computer can communicate with Google Names that can be translated through DNS to IP addresses are referred to as Fully Qualified Domain Names FQDNs DNS QUERY 1001100100011010100 “Here’s the IP address” 0101010001 1001100100011 ug-co hugesoft org 0101010001 1010010010100101 0100100001 0100100001 C2 Figure 24 DNS queries are used to resolve APT1 FQDNs to many C2 server IPs Mandiant APT1 44 www mandiant com 2004 APT1’s infrastructure includes FQDNs in addition to the IP addresses discussed above The FQDNs play an important role in their intrusion campaigns because APT1 embeds FQDNs as C2 addresses within their backdoors In the last several years we have confirmed 2 551 FQDNs attributed to APT1 Of these we have redacted FQDNs that implicated victims by name and provided 2 046 in Appendix D By using FQDNs rather than hardcoded IP addresses as C2 addresses attackers may dynamically decide where to direct C2 connections from a given backdoor That is if they lose control of a specific hop point IP address they can “point” the C2 FQDN address to a different IP address and resume their control over victim backdoors This flexibility allows the attacker to direct victim systems to myriad C2 servers and avoid being blocked APT1 Zone Registrations hugesoft org 2005 ustvb com uszzcs com hvmetal com hkcastte com 2006 arrowservice net blackcake net businessconsults net infosupports com newsonet net purpledaily com 2007 avvmail com shepmas com syscation com tibethome org microsoft-update-info com 2008 busketball com comrepair net gmailboxes com oplaymagzine com maltempata com nirvanaol com 2009 7 zones created cnndaily com myyahoonews com satellitebbs com 2010 bpyoyo com skyswim net cslisten com chileexe77 com issnbgkit net progammerli com idirectech com livemymsn com giftnews org onefastgame net conferencesinfo com 5 zones created 6 zones created usnftc org 4 zones created micyuisyahooapis com infobusinessus org Registered Zones webservicesupdate com ns06 net 7 zones created nytimesnews net cnnnewsdaily com applesoftupdate com APT1 FQDNs can be grouped into three categories 1 registered zones 2 third-party zones and 3 hijacked domains bigish net cometoway org copporationnews com 2012 ifexcel com msnhome org usabbs org 6 zones created 2011 attnpower com 6 zones created phoenixtvus com ushongkong org newsesport com youipcam com olmusic100 com todayusa org bluecoate com The first zone we became aware of was “hugesoft org” which was registered through eNom Inc in October 2004 The registrant supplied “uglygorilla@163 com” as an email address The supplied registration information which is still visible in public “whois” data as of February 3 2013 includes the following 4 zones created bigdepression net Mandiant APT1 A DNS zone represents a collection of FQDNs that end with the same name and which are usually registered through a domain registration company and controlled by a single owner For example “hugesoft org” is an FQDN but also represents a zone The FQDNs “ug-co hugesoft org” and “7cback hugesoft org” are part of the “hugesoft org” zone and are called “subdomains” of the zone The person who registered “hugesoft org” may add as many subdomains as they wish and controls the IP resolutions of these FQDNs APT1 has registered at least 107 zones since 2004 Within these zones we know of thousands of FQDNs that have resolved to hundreds of IP addresses which we suspect are hops and in some instances to APT1’s source IP addresses in Shanghai 45 www mandiant com Domain Name HUGESOFT ORG Created On 25-Oct-2004 09 46 18 UTC Registrant Name huge soft Registrant Organization hugesoft Registrant Street1 shanghai Registrant City shanghai Registrant State Province S Registrant Postal Code 200001 Registrant Country CN Registrant Phone 86 21000021 Registrant Email uglygorilla@163 com The supplied registrant information does not need to be accurate for the zone to be registered successfully For example “shanghai” is not a street name Nevertheless it is noteworthy that Shanghai appeared in the first known APT1 domain registration along with a phone number that begins with China’s “ 86” international code In fact Shanghai was listed as the registrant’s city in at least 24 of the 107 22% registrations Compare this to the frequency with which other cities appeared in APT1 zone registration information Table 10 Locations supplied in registration data other than Shanghai China Number 7 5 4 4 4 3 3 3 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 27 Mandiant APT1 City Beijing Calgary Guizhou Pasadena Houston Sydney Salt Lake Washington DC Homewood Kalkaska Shallotte Yellow Spring New York Provo Shenzhen Birmingham Scottsdale Sunnyvale Albany Pearl River Chicago Moscow Nanning Wuhua Registration information blocked or not available 46 State CA TX UT AL MI NC OH NY UT AL AZ CA NY NY - Country China Canada China US US Australia US US US US US US US US China US US US US US US Guatemala China China www mandiant com Some of the supplied registration information is obviously false For example consider the registration information supplied for the zone “uszzcs com” in 2005 Victor etejedaa@yahoo com 86 8005439436 Michael Murphy 795 Livermore St Yellow Spring Ohio UNITED STATES 45387 Here a phone number with a Chinese prefix “ 86” accompanied an address in the United States Since the United States uses the prefix “ 1” it is highly unlikely that a person living in Ohio would provide a phone number beginning with “ 86” Additionally the city name is spelled incorrectly as it should be “Yellow Springs” instead of “Yellow Spring” This could have been attributed to a one-time spelling mistake except the registrant spelled the city name incorrectly multiple times both for the zones “uszzcs com” and “attnpower com” This suggests that the registrant really thought “Yellow Spring” was the correct spelling and that he or she did not in fact live or work in Yellow Springs Ohio Overall the combination of a relatively high number of “Shanghai” registrations with obviously false registration examples in other registrations suggests a partially uncoordinated domain registration campaign from 2004 until present in which some registrants tried to fabricate non-Shanghai locations but others did not This is supported by contextual information on the Internet for the email address “lfengg@163 com ” which was supplied in the registration information for seven of the 107 zones On the site “www china-one org ” the email address “lfengg@163 com” appears as the contact for the Shanghai Kai Optical Information Technology Co Ltd a website production company located in a part of Shanghai that is across the river from PLA Unit 61398 Figure 25 An email address used to register APT1 zones is also a contact for a Shanghai company Mandiant APT1 47 www mandiant com Naming Themes About half of APT1’s known zones were named according to three themes news technology and business These themes cause APT1 command and control addresses to appear benign at first glance However we believe that the hundreds of FQDNs within these zones were created for the purpose of APT1 intrusions Note these themes are not unique to APT1 or even APT in general The news-themed zones include the names of well-known news media outlets such as CNN Yahoo and Reuters However they also include names referencing English-speaking countries such as “aunewsonline com” Australia “canadatvsite com” Canada and “todayusa org” U S Below is a list of zones registered by APT1 that are newsthemed aoldaily com aunewsonline com canadatvsite com canoedaily com cnndaily com cnndaily net cnnnewsdaily com defenceonline net freshreaders net giftnews org issnbgkit net mediaxsds net myyahoonews com newsesport com newsonet net newsonlinesite com newspappers org nytimesnews net oplaymagzine com phoenixtvus com purpledaily com reutersnewsonline com rssadvanced org saltlakenews org sportreadok net todayusa org usapappers com usnewssite com yahoodaily com The technology-themed zones reference well-known technology companies AOL Apple Google Microsoft antivirus vendors McAfee Symantec and products Blackberry Bluecoat APT1 also used more generic names referencing topics like software aolon1ine com applesoftupdate com blackberrycluter com bluecoate com comrepair net dnsweb org downloadsite me firefoxupdata com globalowa com gmailboxes com hugesoft org idirectech com ifexcel com infosupports com livemymsn com mcafeepaying com microsoft-update-info com micyuisyahooapis com msnhome org pcclubddk net progammerli com softsolutionbox net symanteconline net webservicesupdate com Finally some zones used by APT1 reflect a business theme The names suggest websites that professionals might visit advanbusiness com businessconsults net businessformars com companyinfosite com conferencesinfo com copporationnews com infobusinessus org jobsadvanced com Not every zone stays within APT1’s control forever Over a campaign lasting for so many years APT1 has not always renewed every zone in their attack infrastructure Additionally while some have simply been allowed to expire others have been transferred to the organizations that the domain names attempted to imitate For example in September 2011 Yahoo filed a complaint against “zheng youjun” of “Arizona USA” who registered the APT1 zone “myyahoonews com” 37 Yahoo alleged the “ myyahoonews com domain name was confusingly similar to Complainant’s YAHOO mark” and that “ zheng youjun registered and used the myyahoonews com domain name in bad faith ” In response the National Arbitration Forum found that the site “myyahoonews com” at the time resolved Yahoo Inc v Zheng National Arbitration Forum Claim Number FA1109001409001 October 31 2011 Tyrus R Atkinson Jr panelist http domains adrforum com domains decisions 1409001 htm accessed February 6 2013 37 Mandiant APT1 48 www mandiant com to “a phishing web page substantially similar to the actual WorldSID website in an effort to collect login credentials under false pretenses ” Not surprisingly “zheng youjun” did not respond Subsequently control of “myyahoonews com” was transferred from APT1 to Yahoo Third-Party Services The third-party service that APT1 has used the most is known as “dynamic DNS ” This is a service that allows people to register subdomains under zones that other people have registered and provided to the service Over the years APT1 has registered hundreds of FQDNs in this manner When they need to change the IP resolution of an FQDN they simply log in to these services and update the IP resolution of their FQDN via a web-based interface In addition to dynamic DNS recently we have observed that APT1 has been creating FQDNs that end with “appspot com” suggesting that they are using Google’s App Engine service Hijacked FQDNs APT1 intruders often use the FQDNs that are associated with legitimate websites hosted by their hop points We consider these domains to be “hijacked” because they were registered by someone for a legitimate reason but have been leveraged by APT1 for malicious purposes APT1 uses hijacked FQDNs for two main purposes First they place malware usually in ZIP files on the legitimate websites hosted on the hop point and then send spear phishing emails with a link that includes the legitimate FQDN Second they embed hijacked FQDNs as C2 addresses in their backdoors Evidence of a Vast Infrastructure As noted above we have confirmed the existence of 937 servers listening applications hosted on 849 distinct IP addresses with the majority of IP addresses registered to organizations in China 709 followed by the U S 109 In the last three years we have observed APT1 FQDNs resolving to 988 unique IP addresses that we believe are not “sinkhole”38 or “domain parking”39 IP addresses »» United States 559 »» China 263 »» Taiwan 25 »» Korea 22 »» United Kingdom 14 »» Canada 12 »» Other 83 A sinkhole is a server that accepts redirected connections for known malicious domains Attempted connections to C2 FQDNs are redirected to sinkholes once malicious zones are re-registered by research organizations or security companies in coordination with registration companies 38 Some IP addresses are used for “domain parking” once the original registrant loses control of a zone or otherwise-registered FQDN e g when the zone expires These IP addresses usually host advertisements 39 Mandiant APT1 49 www mandiant com The vast majority of the Chinese IP addresses again belong to APT1’s home networks meaning that in some instances APT1 intruders probably communicated directly to victim systems from their Shanghai systems bypassing their hop infrastructure Table 11 APT1 FQDNs have resolved to IP addresses within these Chinese net blocks Number Net block Registered Owner 150 223 166 0 0 - 223 167 255 255 China Unicom Shanghai Network 68 58 246 0 0 - 58 247 255 255 China Unicom Shanghai Network 10 112 64 0 0 - 112 65 255 255 China Unicom Shanghai Network 7 114 80 0 0 - 114 95 255 255 China Telecom Shanghai Network 5 139 226 0 0 - 139 227 255 255 China Unicom Shanghai Network 4 222 64 0 0 - 222 73 255 25 China Telecom Shanghai Network 3 116 224 0 0 – 116 239 255 255 China Telecom Shanghai Network 16 Other Non-Shanghai These statistics indicate that there are over 400 IP addresses in the U S alone that may have active APT1 servers which are as-yet unconfirmed by Mandiant Additionally although we know of over 2 500 APT1 FQDNs there are many APT1 FQDNs that we have not attributed to APT1 which have resolved to even more IP addresses We estimate conservatively that APT1’s current hop infrastructure includes over 1 000 servers Mandiant APT1 50 www mandiant com A P T 1 Ide n t itie s APT1 is not a ghost in a digital machine In our effort to underscore that there are actual individuals tasked by the PLA behind APT1’s keyboards we have decided to expose the identities of a select number of APT1 personas These actors have made poor operational security choices facilitating our research and allowing us to track their activities They are some of the authors of APT1’s digital weapons and the registrants of APT1 FQDNs and email accounts These actors have expressed interest in China’s cyber warfare efforts disclosed their locations to be the Pudong New Area of Shanghai and have even used a Shanghai mobile phone number to register email accounts used in spear phishing campaigns Methods for attributing APT personnel often involve the synthesis of many small pieces of information into a singular comprehensive picture Often this unified viewpoint reveals not only the group attribution but coherent pockets of behavior within the group which we perceive to be either small teams or individual actors We refer to these as “personas ” As APT1 personas manage technical resources such as hops and Fully Qualified Domain Names FQDNs they have been observed to de-conflict their actions amongst themselves by coordinating the use of specific hops FQDNs CNO tools e g malware and ports One additional element working in our favor as threat trackers is the Great Firewall of China GFWoC Like many Chinese hackers APT1 attackers do not like to be constrained by the strict rules put in place by the Communist Party of China CPC which deployed the GFWoC as a censorship measure to restrict access to web sites such as google com facebook com and twitter com Additionally the nature of the hackers’ work requires them to have control of network infrastructure outside the GFWoC This creates a situation where the easiest way for them to log into Facebook and Twitter is directly from their attack infrastructure Once noticed this is an effective way to discover their real identities What is the Great Firewall of China The “Great Firewall” is a term used to describe the various technical methods used by the Chinese government to censor and block or restrict access to Internet services and content that the government considers sensitive or inappropriate “Inappropriate” content ranges from pornography to political dissent and from social media to news sites that may portray China or Chinese officials in a negative light The “Great Firewall” uses methods such as blocking particular IP addresses blocking or redirecting specific domain names filtering or blocking any URL containing target keywords and rate-limiting or resetting TCP connections Chinese censors also routinely monitor Chinese websites blogs and social media for “inappropriate” content removing it when found As a result Chinese citizens who wish to access censored content must resort to workarounds such as the use of encryption China continues to improve and further restrict Internet access most recently in December 2012 by blocking additional services and limiting or blocking the use of encryption technologies such as Virtual Private Networks Mandiant APT1 51 www mandiant com APT1 Hacker Profile Ugly Gorilla Wang Dong 汪东 The story of “Ugly Gorilla” UG dates back to 2004 A then-professor named Zhang Zhaozhong 张召 忠 now a retired rear admiral was in the process of helping to shape the future of China’s information warfare strategy 40 Professor Zhang was already a strong advocate for the “informationization” of military units and had published several works on military strategy including “Network Warfare” 网络战争 and “Winning the Information War” 打赢信息化战争 As Director of the “Military Technology and Equipment” 军事科技与装备 department at China’s National Defense University 国防大学 professor Zhang was invited to take part in an event titled “Outlook 2004 The International Strategic Situation” in January 2004 During the online question and answer session hosted by the PLA Daily’s 解放军报 China Military Online 中国军网 one young man with the nickname “Greenfield” 绿野 posed a particularly prescient question Figure 26 Professor Zhang 张召忠 16 Jan 2004 source http www chinamil com cn site1 gflt 2004-09 30 content_705216 htm “Professor Zhang I read your book ’Network Warfare‘ and was deeply impressed by the views and arguments in the book It is said that the U S military has set up a dedicated network force referred to as a ‘cyber army ’ Does China have a similar force Does China have cyber troops ” — UglyGorilla 16 Jan 2004 Like all users of the China Military Online chinamil forums “Greenfield” was required to sign up with an email address and specify a small bit of information about himself Thankfully the Internet’s tendency to immortalize data preserved the profile details for us 40 http www chinamil com cn site1 gflt 2004-09 30 content_705216 htm Mandiant APT1 52 www mandiant com Figure 27 UglyGorilla chinamil profile source http bbs chinamil com cn forum bbsui jsp id o 5681 Mandiant APT1 53 www mandiant com Figure 28 UglyGorilla chinamil profile translated by translate google com Thus the persona we call “UglyGorilla” UG was first documented In addition to his email address UG listed his “real name” as “JackWang” Within the year we saw the first evidence of UG honing the tools of his trade On October 25 2004 UG registered the now infamous “hugesoft org” zone The “hugesoft org” zone and its many APT1-attributed hostnames have remained active and under the continuous ownership of UG and are still active as of the time of this report Registration information was most recently updated on September 10 2012 extending the registration period for the zone well into 2013 We may see UG relinquish this and other attributed zones as a result of this reporting in an effort to deter further tracking and attribution In 2007 UG authored the first known sample of the MANITSME family of malware and like a good artist left his clearly identifiable signature in the code “v1 0 No Doubt to Hack You Writed by UglyGorilla 06 29 2007” sic UG’s tendency to sign his work is present in the strings he chooses for hostnames and even within the communications protocols his backdoors use For example Mandiant APT1 What is a meat chicken Chinese Hacker Slang “rouji” 肉鸡 — Meat Chicken n — An infected computer Example strings from MANITSME samples “d My Documents Visual Studio Projects rouji SvcMain pdb” Examples from other malware… “connecting to rouji” “welcome to rouji ” 54 www mandiant com hostnames within other APT1-attributed FQDNs such as “arrowservice net” and even the newer “msnhome org” continue to leave UG’s imprint note the “ug” in the domains »» ug-opm hugesoft org »» ug-rj arrowservice net »» ug-hst msnhome org Though these kinds of obvious attribution links tapered off as UG became more experienced the protocol signatures of his tools such as MANITSME and WEBC2-UGX continue to be used by APT1 attackers based out of Shanghai UG’s consistent use of the username “UglyGorilla” across various Web accounts has left a thin but strong thread of attribution through many online communities In most instances content such as hacking tools information security topics and association with the Shanghai locality are reasonable ways to eliminate false positives For example in February of 2011 the disclosure of all registered “rootkit com” accounts published by Anonymous included the user “uglygorilla” with the registered email address uglygorilla@163 com This is the same email used to register for the 2004 PLA forum and the zone hugesoft org Included in the rootkit com leaked account information was the IP address 58 246 255 28 which was used to register UG’s account directly from the previously discussed APT1 home range 58 246 0 0 15 In a few of these accounts UG has listed something other than “JackWang” as his real name On February 2 2006 a user named “uglygorilla” uploaded a file named “mailbomb_1 08 zip” a bulk email tool to the Chinese developer site PUDN www pudn com His account details from PUDN included the real name “Wang Dong” 汪东 Figure 29 Wang Dong’s Uploaded Files to pudn com It is important to note two things at this point First Chinese names begin with the surname So “Wang” is the last name in 汪东 Second it is a fairly common practice for the Chinese even in China to choose an English first name Thus “JackWang” may not have been an alias at all Mandiant APT1 55 www mandiant com APT1 Hacker Profile DOTA Another APT1 persona is “dota” DOTA named for his strong tendency to use variants of that name in almost all accounts he creates and uses from his attack infrastructure DOTA may have taken his name from the video game “Defense of the Ancients” which is commonly abbreviated DotA though we have yet to observe any direct link or other direct reference to the game We have monitored the creation of dozens of accounts including d0ta010@hotmail com and dota d013@gmail com and have often seen DOTA create several sequential accounts for example dota d001 through dota d015 at webbased email services Most often these accounts are used in social engineering and phishing attacks or as the contact email address when signing up for other services For example DOTA originating from the APT1 home range IP address 58 247 26 59 with a Simplified Chinese keyboard setting used the email address “d0ta001@hotmail com” from his US hop to register the Facebook user “do ta 5011” Facebook user id 100002184628208 Some services such as Google’s Gmail require users to provide a phone number during the registration process to which they send a validation “text message” containing a verification code The user must then input the verification code on the website to finalize registration In an observed session on a compromised machine DOTA used the phone number “159-2193-7229” to receive a verification text message from Google which he then submitted to their page within seconds Telephone numbers in China are organized into a hierarchy containing an area code prefix and line number similar to phone numbers in the United States with the addition that a few area codes are allocated for use by mobile phone providers The phone number “159-2193-7229” breaks down into the “159” area code which indicates a mobile phone provided by China Mobile and the prefix “2193” which indicates a Shanghai mobile number This means at the very least that the number was initially allocated by China Mobile for use in Shanghai The speed of DOTA’s response also indicates that he had the phone with him at the time We have also observed DOTA using the names Rodney and Raith to communicate via email in fluent English with various targets including South East Asian military organizations in Malaysia and the Philippines It is unclear if this Gmail account is used exclusively for facilitating his CNO mission but much of the traffic indicates its use in both simple phishing attacks as well as more sophisticated email based social engineering Mandiant APT1 56 DOTA a Harry “Poter” fan The DOTA persona also appears to be a fan of the popular “Harry Potter” character frequently setting accounts “security questions” such as “Who is your favorite teacher ” and “Who is your best childhood friend ” to the values “Harry” and “Poter” and creating accounts such as poter spo1@gmail com with the alternate email address set to dota sb005@gmail com www mandiant com Figure 30 dota d001@gmail com inbox view 41 When creating dozens or hundreds of accounts in online communities and on victim systems password management becomes a significant undertaking Consequently most APT1 attackers use passwords that are either pattern-based such as the keyboard pattern “1qaz2wsx” or highly memorable using “rootkit” as a password on the information security research site rootkit com Like many APT1 attackers DOTA frequently uses keyboard based patterns as passwords such as “1qaz@WSX#EDC” However there is one password “2j3c1k” extensively used by DOTA that is not based on a keyboard pattern though he may not be the only APT1 actor that uses it A numbered “j” followed by a numbered “c” and then a numbered “k” is likely shorthand “j” ”c” ”k” for the ju chu ke 局／处／科 organizational structure translated to Bureau Division or Office Section widely used within PLA General Staff Department organizations Project 2049 describes the typical PLA organizational structure as “Bureau-level directors … oversee between six and 14 subordinate sites or offices chu 处 … Sites offices under bureaus are further divided into sections 41 This is a screen capture of DOTA accessing his Gmail account while using a compromised system on APT1’s attack infrastructure Mandiant APT1 57 www mandiant com ke 科 42 Given this pattern it is likely that the password “2j3c1k” stands for 2nd Bureau Unit 61398 3rd Division 1st Section demonstrating that those who use these patterns are working together and affiliate themselves to the 2nd Bureau Attempting to track the DOTA persona back to a particular individual is difficult the trail of his activity does not link as clearly to a real world identity However Mandiant has been able to establish a clear link between UG and DOTA Specifically we have observed the two using shared APT1 infrastructure FQDNs and egress IP address ranges The coordination of this shared infrastructure combined with their close proximity and association with Unit 61398 makes it highly likely that at the very least UG and DOTA know each other personally and likely even work together APT1 Hacker Profile SuperHard Mei Qiang 梅强 The third and final persona we are revealing has been dubbed “SuperHard” SH SH was first observed as a tool author and is either the creator or a significant contributor to the AURIGA and BANGAT malware families covered in Appendix C The Malware Arsenal Similarly to UG SH signs much of his work by embedding strings within the tools In particular elements of the portable executable PE file’s VS_VERSIONINFO structure are frequently set to “SuperHard ” or cmd exe copies are modified from “Microsoft corp ” to “superhard corp ” Additionally many of SH’s tools contain driver modules designed to be loaded into the Windows kernel in order to subvert elements of the system While not unique for APT1 coders this level of development expertise is certainly a discriminator that puts SH into a smaller group of highly capable developers within APT1 Often SH’s tools are observed in use by other APT1 personae and in several instances other APT groups we track Given that SH’s tools are used by other APT1 actors and that there are no indications that SH is a full-time operator we believe that SH is primarily involved in research and development for APT1 Once again in tracking SH we are fortunate to have access to the accounts disclosed from rootkit com The rootkit com account “SuperHard_M” was originally registered from the IP address 58 247 237 4 within one of the known APT1 egress ranges and using the email address “mei_qiang_82@sohu com” We have observed the DOTA persona emailing someone with the username mei_qiang_82 The name “Mei Qiang” 梅强 is a reasonably common Chinese last first name combination Additionally it is a common practice for Chinese netizens to append the last two digits of their birth year suggesting that SuperHard is in fact Mei Qiang and was born in 1982 Unfortunately there are several “Mei Qiang” identities online that claim a birth year of 1982 making attribution to an individual difficult Fortunately we can use SH’s email address to connect him to a number of Websites and forums on which he registered and contributed using that address Many of these accounts reveal details that reinforce SH’s link to the “mei_qiang_82@sohu com”43 email address and APT1 affiliation such as SH offering to write Trojans for money his involvement with malicious Windows kernel research incidentally also commented on by “greenfield” possibly UG and more recently being local to Shanghai’s Pudong New Area 44 Mark A Stokes Jenny Lin and L C Russell Hsiao “The Chinese People’s Liberation Army Signals Intelligence and Cyber Reconnaissance Infrastructure ” Project 2049 Institute 2011 6-7 http project2049 net documents pla_third_department_sigint_cyber_stokes_lin_hsiao pdf accessed February 6 2013 42 43 Sohu com is a popular Chinese search engine webmail and Internet advertising company based out of Beijing China 44 hxxp tuziw com index php m ta id 1864863532 Mandiant APT1 58 www mandiant com C on cl u s io n In a State that rigorously monitors Internet use it is highly unlikely that the Chinese Government is unaware of an attack group that operates from the Pudong New Area of Shanghai The detection and awareness of APT1 is made even more probable by the sheer scale and sustainment of attacks that we have observed and documented in this report Therefore the most probable conclusion is that APT1 is able to wage such a long-running and extensive cyber espionage campaign because it is acting with the full knowledge and cooperation of the government Given the mission resourcing and location of PLA Unit 61398 we conclude that PLA Unit 61398 is APT1 Table 12 summarizes the parallels between APT1 and PLA Unit 61398 Table 12 Matching characteristics between APT1 and Unit 61398 Characteristic APT1 as directly observed Unit 61398 as reported Mission area »» Steals intellectual property from Englishspeaking organizations »» Conducts computer network operations against English-speaking targets »» Targets strategic emerging industries identified in China’s 12th Five Year Plan Tools Tactics and Procedures TTPs »» Organized funded disciplined operators with specific targeting objectives and a code of ethics e g we have not witnessed APT1 destroy property or steal money which contrasts most “hackers” and even the most sophisticated organize crime syndicates Scale of operations »» Continuously stealing hundreds of terabytes »» As part of the PLA has the resources from 141 organizations since at least 2006 people money influence necessary to simultaneously targeting victims across at orchestrate operation at APT1’s scale least 20 major industries »» Has hundreds perhaps thousands of »» Size of “hop” infrastructure and continuous people as suggested by the size for their malware updates suggest at least dozens facilities and position within the PLA but probably hundreds of operators with hundreds of support personnel Mandiant APT1 59 »» Conducts military-grade computer network operations www mandiant com Characteristic APT1 as directly observed Unit 61398 as reported Expertise of personnel »» English language proficiency »» English language requirements »» Malware authoring »» Operating system internals digital signal processing steganography »» Computer hacking Location »» Ability to identify data worth stealing in 20 industries »» Recruiting from Chinese technology universities »» APT1 actor used a Shanghai phone number to register email accounts »» Headquarters and other facilities spread throughout the Pudong New Area of Shanghai China »» Two of four “home” Shanghai net blocks are assigned to the Pudong New Area »» Systems used by APT1 intruders have Simplified Chinese language settings »» An APT1 persona’s self-identified location is the Pudong New Area Infrastructure »» Ready access to four main net blocks in Shanghai hosted by China Unicom one of two Tier 1 ISPs in China »» Co-building network infrastructure with China Telecom in the name of national defense »» Some use of China Telecom IP addresses the other Tier 1 ISP Combining our direct observations with carefully researched and correlated findings we believe the facts dictate only two possibilities Either A secret resourced organization full of mainland Chinese speakers with direct access to Shanghai-based telecommunications infrastructure is engaged in a multi-year enterprise scale computer espionage campaign right outside of Unit 61398’s gates performing tasks similar to Unit 61398’s known mission Or APT1 is Unit 61398 Mandiant APT1 60 www mandiant com Appe n di x A H o w Do e s Ma n di a n t D i s t i n g u i s h Th r e at G r o u ps Mandiant uses the term threat group to refer to a collection of intruders who are working together to target and penetrate networks of interest These individuals may share the same set of tasks coordinate their targets and share tools and methodology They work together to gain access to their targets and steal data Therefore a group is ultimately defined by people and not by methodology However defining a threat group based on observed intrusion activity is not so simple Without seeing who is sitting behind the keyboard it may be difficult to determine whether two different intrusion events were conducted by the same person by two people who are working together by two unrelated people who independently compromised the same network or even the same computer Different groups may use similar intrusion methodology and common tools particularly those that are widely available on the Internet such as pwdump HTRAN or Gh0st RAT Furthermore there may be overlaps between groups caused by the sharing of malware or exploits they have authored or even the sharing of personnel Individual intruders may move between groups either temporarily or permanently An intruder may be a private citizen who is hired by multiple groups Finally multiple groups may work together on occasion to compromise the same target Nevertheless distinguishing one threat group from another is possible with enough information analytical experience and the technological tools to piece it all together Consider an analogy with the physical world imagine a thief who leaves behind traces of his crime at various crime scenes Individual robberies may vary in many details »» The method the thief used to break in »» The tools used to open the safe »» Whether the thief carefully selected a particular item to steal or took everything in the hope that he managed to grab something of value »» Whether the thief carefully researched their target disabled alarms and attempted to remove evidence such as fingerprints or whether he was not very careful but simply relied on being “stealthy enough” to not get caught Mandiant APT1 61 www mandiant com Forensic scientists can analyze multiple crime scenes and be able to tell by the evidence left behind that a given crime scene was the result of one thief and not another In a similar way cyber intruders leave behind various digital “fingerprints ” They may send spear-phishing emails from a specific IP address or email address Their emails may contain certain patterns of subject lines Their files have specific names MD5 hashes timestamps custom functions and encryption algorithms Their backdoors may have command and control IP addresses or domain names embedded These are just a few examples of the myriad of linkages that computer forensic analysts consider when trying to distinguish one cyber threat group from another Digital “fingerprints” do not all carry equal weight in attribution analysis Their validity or value as indicators of a specific threat group depends largely on their likelihood of uniqueness For example the use of a widely available tool such as HTRAN is not unique and not useful — by itself — as an indicator of a specific threat group In contrast the use of a specific custom backdoor not observed elsewhere is a much stronger indicator — although it is generally still not sufficient on its own for positive attribution At the most basic level we say that two intrusion events are attributed to the same group when we have collected enough indicators to show beyond a reasonable doubt that the same person or group of people were involved Mandiant APT1 62 www mandiant com Appe n di x B A PT a n d t h e At ta ck Life cy cle While most computer intrusions follow a generic high-level series of steps in the attack lifecycle the Chinese APT lifecycle differs slightly because of their unique long-term objectives The sections below correspond to the stages of Mandiant’s Attack Lifecycle model and give an overview of what APT activity looks like in each stage The stages between “Establish Foothold” and “Complete Mission” do not have to occur in this order every time In fact once established within a network APT groups will continually repeat the cycle of conducting reconnaissance identifying data of interest moving laterally to access that data and “completing mission” by stealing the data This will generally continue indefinitely until they are removed entirely from the network Initial Compromise The Initial Compromise stage represents the methods that intruders use to penetrate a target organization’s network APT intruders frequently target individual users within a victim environment As such the most commonly observed method of initial compromise is spear phishing Spear phishing messages may contain malicious attachments a link to a malicious file or a link to a malicious website Less commonly APT intruders may attempt to contact potential victims and send malicious content via social networking sites or instant messaging Another common tactic is strategic web compromise in which the attacker places malicious code on websites that people in targeted organizations will likely visit When they visit these websites in the course of their normal duties they will be compromised if their computer is vulnerable to the attacker’s exploit code APT groups may also look for vulnerable Internet-facing web servers and upload webshells in order to gain access to a targets internal network or look for other technical vulnerabilities in public-facing infrastructure Establish Foothold Establishing a foothold ensures that APT threat groups can access and control one or more computers within the victim organization from outside the network APT groups can utilize public backdoors Gh0st RAT and Poison Ivy are common examples “underground” backdoors found in hacker websites or obtained through personal connections and “custom” backdoors that they developed themselves These backdoors usually establish an outbound connection from the victim network to a computer controlled by the attackers The communication methods used by the backdoors vary from clear text or simple encoding to the use of more advanced encoding or encryption The backdoors will give the APT groups basic access to a system typically through a command shell or graphical user interface Mandiant APT1 63 www mandiant com Escalate Privileges Escalating privileges involves acquiring items that will allow access to more resources within the victim environment Most often this consists of obtaining usernames and passwords but it may also include gaining access to PKI certificates VPN client software privileged computers or other resources required to access data or systems of interest APT intruders and intruders in general prefer to leverage privileged accounts where possible such as Domain Administrators service accounts with Domain privileges local Administrator accounts and privileged user accounts This is typically accomplished by first “dumping” password hashes from a computer server or preferably Domain Controller The attacker may be able to obtain legitimate account passwords by “cracking” password hashes Alternately the attacker may leverage the hashes themselves in a “pass-the-hash” attack where the hashed password itself may be used for authentication in lieu of the actual password A number of publicly available tools can be readily leveraged for both password dumping and pass-the-hash attacks Internal Reconnaissance In the Internal Reconnaissance stage the intruder collects information about the victim environment APT threat actors use built-in operating system commands such as the Windows “net” commands to obtain information about the internal network including computers trust relationships users and groups In order to identify data of interest they may perform directory or network share listings or search for data by file extension key word or last modified date Data of interest may take many forms but most commonly consists of documents the contents of user email accounts or databases Therefore file servers email servers and domain controllers are customary targets of internal reconnaissance Some APT groups utilize custom scripts in order to automate the process of reconnaissance and identification of data of interest Move Laterally In most cases the systems that the intruders initially compromise do not contain the data that they want Therefore they must move laterally within a network to other computers that either contain that data or allow them to access it APT groups leverage compromised user credentials or pass-the-hash tools to gain access to additional computers and devices inside of a victim network They commonly use compromised credentials with PsExec and or the Windows Task Scheduler “at” command to execute commands and install malware on remote systems Maintain Presence In this stage the intruders take actions to ensure continued control over key systems in the network environment from outside of the network APT groups often install new backdoors e g different backdoors than the ones installed in the Establish Foothold phase in the environment during the course of the campaign They may install different families of malware on multiple computers and use a variety of command and control addresses presumably for redundancy and to make it difficult to identify and remove all of their access points Additionally APT groups may establish methods of network access that do not involve backdoors so that they can maintain a presence even if network security personnel discover and remove their malware These methods may include the use of valid PKI or VPN credentials allowing the intruders to masquerade as a legitimate user to gain access to a corporate network and internal resources In some instances APT threat actors have been able to circumvent two-factor authentication to maintain access to a victim network and its resources Mandiant APT1 64 www mandiant com Complete Mission The main goal of APT intrusions is to steal data including intellectual property business contracts or negotiations policy papers or internal memoranda Once APT groups find files of interest on compromised systems they often pack them into archive files before stealing them They most commonly use the RAR archiving utility for this task but may also use other publicly available utilities such as ZIP or 7-ZIP APT threat actors not only compress data but frequently password-protect the archive From there they use a variety of methods to transfer files out of the victim network including FTP custom file transfer tools or existing backdoors Mandiant APT1 65 www mandiant com App e n dix C D igita l T h e M a lwa r e Ar s e n a l This appendix is digital and can be found at http www mandiant com apt1 It includes profiles of malware families that APT1 has used Mandiant APT1 66 www mandiant com App e n dix D D igita l F Q D Ns This appendix is digital and can be found accompanying this report It includes fully qualified domain names FQDNs that APT1 has used as part of their attack infrastructure Mandiant APT1 67 www mandiant com App e n dix E D igita l M D5 Ha s h e s This appendix is digital and can be found at http www mandiant com apt1 It includes MD5 hashes of malware that APT1 has used as part of their attack methodology In Appendix G IOCs the IOC named 8dd23e0a-a659-45b4-a16867e4b00944fb ioc contains all of the MD5 hashes provided in this appendix for use in conjunction with Redline™ Mandiant’s free host-based investigative tool or with Mandiant Intelligent Response® MIR Mandiant’s commercal host-based investigative tool Mandiant APT1 68 www mandiant com App e n di x F D igita l SSL C e rtificat e s This appendix is digital and can be found at http www mandiant com apt1 It includes APT1 SSL certificates used on servers that are part of their command and control infrastructure Mandiant APT1 69 www mandiant com App e n dix G D igita l IOC s The portion of this appendix that includes the Indicators of Compromise IOCs is digital and can be found at http www mandiant com apt1 APT1 Indicators and Using Redline™ With the release of Mandiant’s report APT1 Exposing One of China’s Cyber Espionage Units we are providing a set of APT1 IOCs in the digital portion of Appendix G to help detect malware described in Appendix C The Malware Arsenal IOCs can be used in investigations to find unknown evils or for detection of already known threats The IOCs included in Appendix G fit the latter however keep in mind that APT1 does update their tools and there are certainly malware variants and new families of malware that will not be detected with this set of IOCs To find out more about the report or the digital appendices to include downloading the set of APT1 IOCs in Appendix G IOCs go to http www mandiant com apt1 IOCs can be used in conjunction with Redline Mandiant’s free host-based investigative tool or with Mandiant Intelligent Response® MIR Mandiant’s commercial host-based investigative tool Mandiant’s customers who have licensed MIR can simply import a zip file of the IOCs into their controllers For those without MIR Redline can be downloaded from Mandiant’s web site at http www mandiant com resources download redline Remember to always test new IOCs before using them in a production environment What Are IOCs Mandiant has developed an open extendable standard for defining and sharing threat information in a machinereadable format Going well beyond static signature analysis IOCs combine over 500 types of forensic evidence with grouping and logical operators to provide advanced threat detection capability If you are not familiar with IOCs go to the OpenIOC site for a description at http openioc org Mandiant APT1 70 www mandiant com What Is Redline Redline is Mandiant’s free tool for investigating hosts for signs of malicious activity through memory and file analysis and subsequently developing a threat assessment profile Redline provides several benefits including the following Rapid Triage When confronted with a potentially compromised host responders must first assess whether the system has active malware Without installing software or disrupting the current state of the host Redline thoroughly audits all currentlyrunning processes and drivers on the system for a quick analysis for a detailed analysis it also collects the entire file structure network state and system memory Redline will also compare any MD5 value it collects analyzes and visualizes against an MD5 whitelist Users can further analyze and view imported audit data using Redline’s Timeline functionality which includes capabilities to narrow and filter results around a given timeframe with the TimeWrinkles™ and TimeCrunches™ features Reveals Hidden Malware The Redline Portable Agent can collect and analyze a complete memory image working below the level at which kernel rootkits and other malware-hiding techniques operate Many hiding techniques become extremely obvious when examined at the physical memory level making memory analysis a powerful tool for finding malware It also reveals “memory only” malware that is not present on disk Guided Analysis Mandiant’s Redline tool streamlines memory analysis by providing a proven workflow for analyzing malware based on relative priority This takes the guesswork out of task and time allocation allowing investigators to provide a focused response to the threats that matter most Redline calculates a “Malware Risk Index” that highlights processes more likely to be worth investigating and encourages users to follow investigative steps that suggest how to start As users review more audits from clean and compromised systems they build up the experience to recognize malicious activity more quickly As you investigate a system here’s how Redline will help you focus your attention on the most productive data Investigative Steps Redline can collect a daunting amount of raw information Its investigative steps help provide a starting place by highlighting specific data and providing views that are most commonly productive in identifying malicious processes Unless you are pursuing a specific “lead” we recommend working through the steps in order examining the information for entries that don’t match your expectations The key to becoming an effective investigator is to review Redline data from a variety of “clean” and “compromised” systems Over time your sense of which entries are normal and which are of concern will develop quickly as you view more data Mandiant APT1 71 www mandiant com Malware Risk Index Scoring Redline analyzes each process and memory section using a variety of rules and techniques to calculate a “Malware Risk Index” for each process This score is a helpful guide to identifying those processes that are more likely to be worth investigating Processes at the highest risk of being compromised by malware are highlighted with a red badge Those with some risk factors have a grey badge and low-risk processes have no badge The MRI is not an absolute indication of malware During an investigation you can refine the MRI scoring by adjusting specific hits identifying false positives and false negatives for each process adding your own hits and generally tuning the results IOCs Redline provides the option of performing IOC analysis in addition to MRI scoring Supplied a set of IOCs the Redline Portable Agent will be automatically configured to gather the data required to perform a subsequent IOC analysis after the analysis is run IOC hit results are available for further investigation In addition Redline provides the ability to create an IOC Collector This feature enables the collection of data types required for matching a set of IOCs Works with MIR Combined with MIR Redline is a powerful tool for accelerated live response Here’s a typical case »» IDS or other system detects suspicious activity on a host »» From MIR an investigator launches a remote live response script »» The MIR Agent running on the host captures and analyzes memory locally streaming back a small XML audit that downloads in minutes rather than hours »» From MIR the user can open the audit directly in Redline »» Using Redline the investigator quickly identifies a malicious process and writes an IOC describing the forensic attributes found in Redline »» Using MIR and MCIC the investigator is quickly able to sweep for that IOC and discover all other systems on the network with the same or similar malware running Mandiant APT1 72 www mandiant com Have MIR Customers had Access to these IOCs Before These IOCs are new However much of the detection capability in this set of indicators has already been available to our MIR customers The IOCs may look different though as a result of improvements in creation and testing Mandiant started 2013 with a focus on taking better advantage of our threat intelligence We plan to continue to improve the synthesis of our threat intelligence and our IOCs by improving our breadth IOC creation process IOC management process and IOC testing The majority of these indicators or modified versions of them will be integrated into the next IOC release What Is the FAMILY Designator in This Set of IOCs We are using a new IOC designator in these IOCs called “ FAMILY ” Mandiant’s Threat Intelligence Unit tracks malware by common features seen in groups of binaries We call those groupings of binaries “families ” The IOCs included in this appendix are representatives of families of malware used by APT1 The new designator follows the family name in the “Name” field of the IOC and the presence of FAMILY implies that that IOC applies to the whole family not just one sample Why Do These IOCs Look Somewhat Different Than Other IOCs I Have Seen From Mandiant In many cases we have combined information that previously would have been in several indicators into a single indicator Additionally we have removed certain types of intelligence since they are being released in separate appendices such as FQDNs and IPs Additionally some IOCs in this set are using file permutation blocks to catch variants of malware that might not be detected otherwise What Is a File Permutation block It is a different way to structure lists of File Item attributes to look for an entire family of malware versus only one or two pieces For more information on this topic or most any other IOC questions go to https forums mandiant com Will You Update These IOCs It is likely that we will make some changes to the IOCs in Appendix G as we get feedback If updated the updates will be available in the same location as the report http www mandiant com apt1 Will You Be Releasing More IOCs Like This Currently there are no plans for additional public releases of this magnitude Mandiant APT1 73 www mandiant com App e n dix H D igita l Vid e o This appendix is digital and can be found at http www mandiant com apt1 It includes a compilation of videos showing actual attacker sessions and their intrusion activities Mandiant APT1 74 www mandiant com