Exploitation for Client Execution

Adversaries may exploit software vulnerabilities in client applications to execute code. Vulnerabilities can exist in software due to unsecure coding practices that can lead to unanticipated behavior. Adversaries can take advantage of certain vulnerabilities through targeted exploitation for the purpose of arbitrary code execution. Oftentimes the most valuable exploits to an offensive toolkit are those that can be used to obtain code execution on a remote system because they can be used to gain access to that system. Users will expect to see files related to the applications they commonly used to do work, so they are a useful target for exploit research and development because of their high utility.

Several types exist:

Browser-based Exploitation

Web browsers are a common target through Drive-by Compromise and Spearphishing Link. Endpoint systems may be compromised through normal web browsing or from certain users being targeted by links in spearphishing emails to adversary controlled sites used to exploit the web browser. These often do not require an action by the user for the exploit to be executed.

Office Applications

Common office and productivity applications such as Microsoft Office are also targeted through Phishing. Malicious files will be transmitted directly as attachments or through links to download them. These require the user to open the document or file for the exploit to run.

Common Third-party Applications

Other applications that are commonly seen or are part of the software deployed in a target network may also be used for exploitation. Applications such as Adobe Reader and Flash, which are common in enterprise environments, have been routinely targeted by adversaries attempting to gain access to systems. Depending on the software and nature of the vulnerability, some may be exploited in the browser or require the user to open a file. For instance, some Flash exploits have been delivered as objects within Microsoft Office documents.

ID: T1203
Sub-techniques:  No sub-techniques
Tactic: Execution
Platforms: Linux, Windows, macOS
System Requirements: Remote exploitation for execution requires a remotely accessible service reachable over the network or other vector of access such as spearphishing or drive-by compromise.
Version: 1.2
Created: 18 April 2018
Last Modified: 15 October 2021
Provided by LAYER 8

Procedure Examples

ID Name Description
G0018 admin@338

admin@338 has exploited client software vulnerabilities for execution, such as Microsoft Word CVE-2012-0158.[1]

S0331 Agent Tesla

Agent Tesla has exploited Office vulnerabilities such as CVE-2017-11882 and CVE-2017-8570 for execution during delivery.[2]

G0138 Andariel

Andariel has exploited numerous ActiveX vulnerabilities, including zero-days.[3][4][5]

G0005 APT12

APT12 has exploited multiple vulnerabilities for execution, including Microsoft Office vulnerabilities (CVE-2009-3129, CVE-2012-0158) and vulnerabilities in Adobe Reader and Flash (CVE-2009-4324, CVE-2009-0927, CVE-2011-0609, CVE-2011-0611).[6][7]

G0007 APT28

APT28 has exploited Microsoft Office vulnerability CVE-2017-0262 for execution.[8]

G0016 APT29

APT29 has used multiple software exploits for common client software, like Microsoft Word, Exchange, and Adobe Reader, to gain code execution.[9][10][11]

G0022 APT3

APT3 has exploited the Adobe Flash Player vulnerability CVE-2015-3113 and Internet Explorer vulnerability CVE-2014-1776.[12][13]

G0050 APT32

APT32 has used RTF document that includes an exploit to execute malicious code. (CVE-2017-11882)[14]

G0064 APT33

APT33 has attempted to exploit a known vulnerability in WinRAR (CVE-2018-20250), and attempted to gain remote code execution via a security bypass vulnerability (CVE-2017-11774).[15][16]

G0067 APT37

APT37 has used exploits for Flash Player (CVE-2016-4117, CVE-2018-4878), Word (CVE-2017-0199), Internet Explorer (CVE-2020-1380 and CVE-2020-26411), and Microsoft Edge (CVE-2021-26411) for execution.[17][18][19][20]

G0096 APT41

APT41 leveraged the follow exploits in their operations: CVE-2012-0158, CVE-2015-1641, CVE-2017-0199, CVE-2017-11882, and CVE-2019-3396.[21]

S0239 Bankshot

Bankshot leverages a known zero-day vulnerability in Adobe Flash to execute the implant into the victims’ machines.[22]

G0098 BlackTech

BlackTech has exploited multiple vulnerabilities for execution, including Microsoft Office vulnerabilities CVE-2012-0158, CVE-2014-6352, CVE-2017-0199, and Adobe Flash CVE-2015-5119.

G0060 BRONZE BUTLER

BRONZE BUTLER has exploited Microsoft Office vulnerabilities CVE-2014-4114, CVE-2018-0802, and CVE-2018-0798 for execution.[23][24]

G0080 Cobalt Group

Cobalt Group had exploited multiple vulnerabilities for execution, including Microsoft’s Equation Editor (CVE-2017-11882), an Internet Explorer vulnerability (CVE-2018-8174), CVE-2017-8570, CVE-2017-0199, and CVE-2017-8759.[25][26][27][28][29][30][31][32]

S0154 Cobalt Strike

Cobalt Strike can exploit Oracle Java vulnerabilities for execution, including CVE-2011-3544, CVE-2013-2465, CVE-2012-4681, and CVE-2013-2460.[33][34]

G0012 Darkhotel

Darkhotel has exploited Adobe Flash vulnerability CVE-2015-8651 for execution.[35]

S0243 DealersChoice

DealersChoice leverages vulnerable versions of Flash to perform execution.[36]

G0066 Elderwood

Elderwood has used exploitation of endpoint software, including Microsoft Internet Explorer Adobe Flash vulnerabilities, to gain execution. They have also used zero-day exploits.[37]

S0396 EvilBunny

EvilBunny has exploited CVE-2011-4369, a vulnerability in the PRC component in Adobe Reader.[38]

G0101 Frankenstein

Frankenstein has used CVE-2017-11882 to execute code on the victim's machine.[39]

G0125 HAFNIUM

HAFNIUM has exploited CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, and CVE-2021-27065 to compromise on-premises versions of Microsoft Exchange Server, enabling access to email accounts and installation of additional malware.[40][41][42]

S0391 HAWKBALL

HAWKBALL has exploited Microsoft Office vulnerabilities CVE-2017-11882 and CVE-2018-0802 to deliver the payload.[43]

G0126 Higaisa

Higaisa has exploited CVE-2018-0798 for execution.[44]

G0100 Inception

Inception has exploited CVE-2012-0158, CVE-2014-1761, CVE-2017-11882 and CVE-2018-0802 for execution.[45][46][47][48]

S0260 InvisiMole

InvisiMole has installed legitimate but vulnerable Total Video Player software and wdigest.dll library drivers on compromised hosts to exploit stack overflow and input validation vulnerabilities for code execution.[49]

G0032 Lazarus Group

Lazarus Group has exploited Adobe Flash vulnerability CVE-2018-4878 for execution.[22]

G0065 Leviathan

Leviathan has exploited multiple Microsoft Office and .NET vulnerabilities for execution, including CVE-2017-0199, CVE-2017-8759, and CVE-2017-11882.[50][51][52][53]

G0069 MuddyWater

MuddyWater has exploited the Office vulnerability CVE-2017-0199 for execution.[54]

G0129 Mustang Panda

Mustang Panda has exploited CVE-2017-0199 in Microsoft Word to execute code.[55]

G0040 Patchwork

Patchwork uses malicious documents to deliver remote execution exploits as part of. The group has previously exploited CVE-2017-8570, CVE-2012-1856, CVE-2014-4114, CVE-2017-0199, CVE-2017-11882, and CVE-2015-1641.[56][57][58][59][60][61][62]

S0458 Ramsay

Ramsay has been embedded in documents exploiting CVE-2017-0199, CVE-2017-11882, and CVE-2017-8570.[63][64]

G0034 Sandworm Team

Sandworm Team has exploited vulnerabilities in Microsoft PowerPoint via OLE objects (CVE-2014-4114) and Microsoft Word via crafted TIFF images (CVE-2013-3906).[65][66][67]

G0121 Sidewinder

Sidewinder has exploited vulnerabilities to gain execution including CVE-2017-11882 and CVE-2020-0674.[68][69]

S0374 SpeakUp

SpeakUp attempts to exploit the following vulnerabilities in order to execute its malicious script: CVE-2012-0874, CVE-2010-1871, CVE-2017-10271, CVE-2018-2894, CVE-2016-3088, JBoss AS 3/4/5/6, and the Hadoop YARN ResourceManager. [70]

S0578 SUPERNOVA

SUPERNOVA was installed via exploitation of a SolarWinds Orion API authentication bypass vulnerability (CVE-2020-10148).[71][72]

G0062 TA459

TA459 has exploited Microsoft Word vulnerability CVE-2017-0199 for execution.[73]

G0089 The White Company

The White Company has taken advantage of a known vulnerability in Microsoft Word (CVE 2012-0158) to execute code.[74]

G0027 Threat Group-3390

Threat Group-3390 has exploited the Microsoft SharePoint vulnerability CVE-2019-0604.[75]

G0131 Tonto Team

Tonto Team has exploited Microsoft vulnerabilities, including CVE-2018-8174, CVE-2018-0802, and CVE-2017-11882, as well as other vulnerabilities such as CVE-2019-9489 and CVE-2020-8468, to enable execution of their delivered malicious payloads.[76][77]

G0134 Transparent Tribe

Transparent Tribe has crafted malicious files to exploit CVE-2012-0158 and CVE-2010-3333 for execution.[78]

G0081 Tropic Trooper

Tropic Trooper has executed commands through Microsoft security vulnerabilities, including CVE-2017-11882, CVE-2018-0802, and CVE-2012-0158.[79][80]

S0341 Xbash

Xbash can attempt to exploit known vulnerabilities in Hadoop, Redis, or ActiveMQ when it finds those services running in order to conduct further execution.[81][82]

Mitigations

ID Mitigation Description
M1048 Application Isolation and Sandboxing

Browser sandboxes can be used to mitigate some of the impact of exploitation, but sandbox escapes may still exist. [83] [84]

Other types of virtualization and application microsegmentation may also mitigate the impact of client-side exploitation. Risks of additional exploits and weaknesses in those systems may still exist. [84]

M1050 Exploit Protection

Security applications that look for behavior used during exploitation such as Windows Defender Exploit Guard (WDEG) and the Enhanced Mitigation Experience Toolkit (EMET) can be used to mitigate some exploitation behavior. [85] Control flow integrity checking is another way to potentially identify and stop a software exploit from occurring. [86] Many of these protections depend on the architecture and target application binary for compatibility.

Detection

Detecting software exploitation may be difficult depending on the tools available. Also look for behavior on the endpoint system that might indicate successful compromise, such as abnormal behavior of the browser or Office processes. This could include suspicious files written to disk, evidence of Process Injection for attempts to hide execution, evidence of Discovery, or other unusual network traffic that may indicate additional tools transferred to the system.

References

  1. FireEye Threat Intelligence. (2015, December 1). China-based Cyber Threat Group Uses Dropbox for Malware Communications and Targets Hong Kong Media Outlets. Retrieved December 4, 2015.
  2. Walter, J. (2020, August 10). Agent Tesla | Old RAT Uses New Tricks to Stay on Top. Retrieved December 11, 2020.
  3. FSI. (2017, July 27). Campaign Rifle - Andariel, the Maiden of Anguish. Retrieved September 29, 2021.
  4. IssueMakersLab. (2017, May 1). Operation GoldenAxe. Retrieved September 29, 2021.
  5. Chen, Joseph. (2018, July 16). New Andariel Reconnaissance Tactics Uncovered. Retrieved September 29, 2021.
  6. Moran, N., Oppenheim, M., Engle, S., & Wartell, R.. (2014, September 3). Darwin’s Favorite APT Group [Blog]. Retrieved November 12, 2014.
  7. Sancho, D., et al. (2012, May 22). IXESHE An APT Campaign. Retrieved June 7, 2019.
  8. Kaspersky Lab's Global Research & Analysis Team. (2018, February 20). A Slice of 2017 Sofacy Activity. Retrieved November 27, 2018.
  9. F-Secure Labs. (2015, September 17). The Dukes: 7 years of Russian cyberespionage. Retrieved December 10, 2015.
  10. NCSC, CISA, FBI, NSA. (2021, May 7). Further TTPs associated with SVR cyber actors. Retrieved July 29, 2021.
  11. Microsoft Threat Intelligence Center (MSTIC). (2021, May 27). New sophisticated email-based attack from NOBELIUM. Retrieved May 28, 2021.
  12. Eng, E., Caselden, D.. (2015, June 23). Operation Clandestine Wolf – Adobe Flash Zero-Day in APT3 Phishing Campaign. Retrieved January 14, 2016.
  13. Chen, X., Scott, M., Caselden, D.. (2014, April 26). New Zero-Day Exploit targeting Internet Explorer Versions 9 through 11 Identified in Targeted Attacks. Retrieved January 14, 2016.
  14. Dumont, R. (2019, March 20). Fake or Fake: Keeping up with OceanLotus decoys. Retrieved April 1, 2019.
  15. Security Response attack Investigation Team. (2019, March 27). Elfin: Relentless Espionage Group Targets Multiple Organizations in Saudi Arabia and U.S.. Retrieved April 10, 2019.
  16. Microsoft Threat Protection Intelligence Team. (2020, June 18). Inside Microsoft Threat Protection: Mapping attack chains from cloud to endpoint. Retrieved June 22, 2020.
  17. Raiu, C., and Ivanov, A. (2016, June 17). Operation Daybreak. Retrieved February 15, 2018.
  18. FireEye. (2018, February 20). APT37 (Reaper): The Overlooked North Korean Actor. Retrieved March 1, 2018.
  19. Mercer, W., Rascagneres, P. (2018, January 16). Korea In The Crosshairs. Retrieved May 21, 2018.
  20. Cash, D., Grunzweig, J., Meltzer, M., Adair, S., Lancaster, T. (2021, August 17). North Korean APT InkySquid Infects Victims Using Browser Exploits. Retrieved September 30, 2021.
  21. Fraser, N., et al. (2019, August 7). Double DragonAPT41, a dual espionage and cyber crime operation APT41. Retrieved September 23, 2019.
  22. Sherstobitoff, R. (2018, March 08). Hidden Cobra Targets Turkish Financial Sector With New Bankshot Implant. Retrieved May 18, 2018.
  23. DiMaggio, J. (2016, April 28). Tick cyberespionage group zeros in on Japan. Retrieved July 16, 2018.
  24. Chen, J. et al. (2019, November). Operation ENDTRADE: TICK’s Multi-Stage Backdoors for Attacking Industries and Stealing Classified Data. Retrieved June 9, 2020.
  25. Svajcer, V. (2018, July 31). Multiple Cobalt Personality Disorder. Retrieved September 5, 2018.
  26. Positive Technologies. (2017, August 16). Cobalt Strikes Back: An Evolving Multinational Threat to Finance. Retrieved September 5, 2018.
  27. Positive Technologies. (2016, December 16). Cobalt Snatch. Retrieved October 9, 2018.
  28. Mesa, M, et al. (2017, June 1). Microsoft Word Intruder Integrates CVE-2017-0199, Utilized by Cobalt Group to Target Financial Institutions. Retrieved October 10, 2018.
  29. Klijnsma, Y.. (2017, November 28). Gaffe Reveals Full List of Targets in Spear Phishing Attack Using Cobalt Strike Against Financial Institutions. Retrieved October 10, 2018.
  30. Klijnsma, Y.. (2018, January 16). First Activities of Cobalt Group in 2018: Spear Phishing Russian Banks. Retrieved October 10, 2018.
  31. CrowdStrike. (2018, February 26). CrowdStrike 2018 Global Threat Report. Retrieved October 10, 2018.
  32. Giagone, R., Bermejo, L., and Yarochkin, F. (2017, November 20). Cobalt Strikes Again: Spam Runs Use Macros and CVE-2017-8759 Exploit Against Russian Banks. Retrieved March 7, 2019.
  33. Mavis, N. (2020, September 21). The Art and Science of Detecting Cobalt Strike. Retrieved April 6, 2021.
  34. Strategic Cyber LLC. (2020, November 5). Cobalt Strike: Advanced Threat Tactics for Penetration Testers. Retrieved April 13, 2021.
  35. Microsoft. (2016, June 9). Reverse-engineering DUBNIUM. Retrieved March 31, 2021.
  36. Falcone, R. (2018, March 15). Sofacy Uses DealersChoice to Target European Government Agency. Retrieved June 4, 2018.
  37. O'Gorman, G., and McDonald, G.. (2012, September 6). The Elderwood Project. Retrieved February 15, 2018.
  38. Marschalek, M.. (2014, December 16). EvilBunny: Malware Instrumented By Lua. Retrieved June 28, 2019.
  39. Adamitis, D. et al. (2019, June 4). It's alive: Threat actors cobble together open-source pieces into monstrous Frankenstein campaign. Retrieved May 11, 2020.
  40. MSTIC. (2021, March 2). HAFNIUM targeting Exchange Servers with 0-day exploits. Retrieved March 3, 2021.
  41. Gruzweig, J. et al. (2021, March 2). Operation Exchange Marauder: Active Exploitation of Multiple Zero-Day Microsoft Exchange Vulnerabilities. Retrieved March 3, 2021.
  42. Bromiley, M. et al. (2021, March 4). Detection and Response to Exploitation of Microsoft Exchange Zero-Day Vulnerabilities. Retrieved March 9, 2021.
  43. Patil, S. and Williams, M.. (2019, June 5). Government Sector in Central Asia Targeted With New HAWKBALL Backdoor Delivered via Microsoft Office Vulnerabilities. Retrieved June 20, 2019.
  1. PT ESC Threat Intelligence. (2020, June 4). COVID-19 and New Year greetings: an investigation into the tools and methods used by the Higaisa group. Retrieved March 2, 2021.
  2. GReAT. (2019, August 12). Recent Cloud Atlas activity. Retrieved May 8, 2020.
  3. GReAT. (2014, December 10). Cloud Atlas: RedOctober APT is back in style. Retrieved May 8, 2020.
  4. Symantec. (2018, March 14). Inception Framework: Alive and Well, and Hiding Behind Proxies. Retrieved May 8, 2020.
  5. Lancaster, T. (2018, November 5). Inception Attackers Target Europe with Year-old Office Vulnerability. Retrieved May 8, 2020.
  6. Hromcova, Z. and Cherpanov, A. (2020, June). INVISIMOLE: THE HIDDEN PART OF THE STORY. Retrieved July 16, 2020.
  7. Axel F, Pierre T. (2017, October 16). Leviathan: Espionage actor spearphishes maritime and defense targets. Retrieved February 15, 2018.
  8. FireEye. (2018, March 16). Suspected Chinese Cyber Espionage Group (TEMP.Periscope) Targeting U.S. Engineering and Maritime Industries. Retrieved April 11, 2018.
  9. CISA. (2021, July 19). (AA21-200A) Joint Cybersecurity Advisory – Tactics, Techniques, and Procedures of Indicted APT40 Actors Associated with China’s MSS Hainan State Security Department.. Retrieved August 12, 2021.
  10. Accenture iDefense Unit. (2019, March 5). Mudcarp's Focus on Submarine Technologies. Retrieved August 24, 2021.
  11. ClearSky. (2019, June). Iranian APT group ‘MuddyWater’ Adds Exploits to Their Arsenal. Retrieved May 14, 2020.
  12. Meyers, A. (2018, June 15). Meet CrowdStrike’s Adversary of the Month for June: MUSTANG PANDA. Retrieved April 12, 2021.
  13. Cymmetria. (2016). Unveiling Patchwork - The Copy-Paste APT. Retrieved August 3, 2016.
  14. Kaspersky Lab's Global Research & Analysis Team. (2016, July 8). The Dropping Elephant – aggressive cyber-espionage in the Asian region. Retrieved August 3, 2016.
  15. Hamada, J.. (2016, July 25). Patchwork cyberespionage group expands targets from governments to wide range of industries. Retrieved August 17, 2016.
  16. Levene, B. et al.. (2018, March 7). Patchwork Continues to Deliver BADNEWS to the Indian Subcontinent. Retrieved March 31, 2018.
  17. Lunghi, D., et al. (2017, December). Untangling the Patchwork Cyberespionage Group. Retrieved July 10, 2018.
  18. Meltzer, M, et al. (2018, June 07). Patchwork APT Group Targets US Think Tanks. Retrieved July 16, 2018.
  19. Hinchliffe, A. and Falcone, R. (2020, May 11). Updated BackConfig Malware Targeting Government and Military Organizations in South Asia. Retrieved June 17, 2020.
  20. Sanmillan, I.. (2020, May 13). Ramsay: A cyber‑espionage toolkit tailored for air‑gapped networks. Retrieved May 27, 2020.
  21. Antiy CERT. (2020, April 20). Analysis of Ramsay components of Darkhotel's infiltration and isolation network. Retrieved March 24, 2021.
  22. Ward, S.. (2014, October 14). iSIGHT discovers zero-day vulnerability CVE-2014-4114 used in Russian cyber-espionage campaign. Retrieved June 10, 2020.
  23. Wu, W. (2014, October 14). An Analysis of Windows Zero-day Vulnerability ‘CVE-2014-4114’ aka “Sandworm”. Retrieved June 18, 2020.
  24. Li, H. (2013, November 5). McAfee Labs Detects Zero-Day Exploit Targeting Microsoft Office. Retrieved June 18, 2020.
  25. Hegel, T. (2021, January 13). A Global Perspective of the SideWinder APT. Retrieved January 27, 2021.
  26. Cyble. (2020, September 26). SideWinder APT Targets with futuristic Tactics and Techniques. Retrieved January 29, 2021.
  27. Check Point Research. (2019, February 4). SpeakUp: A New Undetected Backdoor Linux Trojan. Retrieved April 17, 2019.
  28. Carnegie Mellon University. (2020, December 26). SolarWinds Orion API authentication bypass allows remote command execution. Retrieved February 22, 2021.
  29. Stoner, J. (2021, January 21). Detecting Supernova Malware: SolarWinds Continued. Retrieved February 22, 2021.
  30. Axel F. (2017, April 27). APT Targets Financial Analysts with CVE-2017-0199. Retrieved February 15, 2018.
  31. Livelli, K, et al. (2018, November 12). Operation Shaheen. Retrieved May 1, 2019.
  32. Falcone, R. and Lancaster, T. (2019, May 28). Emissary Panda Attacks Middle East Government Sharepoint Servers. Retrieved July 9, 2019.
  33. Zykov, K. (2020, August 13). CactusPete APT group’s updated Bisonal backdoor. Retrieved May 5, 2021.
  34. Daniel Lughi, Jaromir Horejsi. (2020, October 2). Tonto Team - Exploring the TTPs of an advanced threat actor operating a large infrastructure. Retrieved October 17, 2021.
  35. Huss, D. (2016, March 1). Operation Transparent Tribe. Retrieved June 8, 2016.
  36. Horejsi, J., et al. (2018, March 14). Tropic Trooper’s New Strategy. Retrieved November 9, 2018.
  37. Ray, V. (2016, November 22). Tropic Trooper Targets Taiwanese Government and Fossil Fuel Provider With Poison Ivy. Retrieved November 9, 2018.
  38. Xiao, C. (2018, September 17). Xbash Combines Botnet, Ransomware, Coinmining in Worm that Targets Linux and Windows. Retrieved November 14, 2018.
  39. Trend Micro. (2018, September 19). New Multi-Platform Xbash Packs Obfuscation, Ransomware, Coinminer, Worm and Botnet. Retrieved June 4, 2019.
  40. Cowan, C. (2017, March 23). Strengthening the Microsoft Edge Sandbox. Retrieved March 12, 2018.
  41. Goodin, D. (2017, March 17). Virtual machine escape fetches $105,000 at Pwn2Own hacking contest - updated. Retrieved March 12, 2018.
  42. Nunez, N. (2017, August 9). Moving Beyond EMET II – Windows Defender Exploit Guard. Retrieved March 12, 2018.
  43. Wikipedia. (2018, January 11). Control-flow integrity. Retrieved March 12, 2018.