738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "userinit.exe,,C:\\Program Files (x86)\\Microsoft Sync Framework\\zWhJDJln.exe"	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,,C:\\Program Files (x86)\\Microsoft Sync Framework\\zWhJDJln.exe"	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe

Modifies firewall policy service 2 TTPs 3 IoCs

evasion

Modify Registry

Modify Existing Service

T1031

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "1"	xCkxmkMM.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DoNotAllowExceptions = "0"	xCkxmkMM.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0"	xCkxmkMM.exe

Modifies security service 2 TTPs 4 IoCs

evasion

Modify Registry

Modify Existing Service

T1031

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\WinDefend\Start = "4"	xCkxmkMM.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\wuauserv\Start = "4"	xCkxmkMM.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\MpsSvc\Start = "4"	xCkxmkMM.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\wscsvc\Start = "4"	xCkxmkMM.exe

UAC bypass 3 TTPs 1 IoCs

Bypass User Account Control

T1088

Disabling Security Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	xCkxmkMM.exe

Windows security bypass 2 TTPs 6 IoCs

Disabling Security Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	xCkxmkMM.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	xCkxmkMM.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	xCkxmkMM.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallOverride = "1"	xCkxmkMM.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	xCkxmkMM.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UacDisableNotify = "1"	xCkxmkMM.exe

Disables Task Manager via registry modification
evasion

Executes dropped EXE 2 IoCs

pid	Process
1508	xCkxmkMM.exe
1000	xCkxmkMM.exe

UPX packed file 8 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/1360-56-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral1/memory/1360-58-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral1/memory/1360-59-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral1/memory/1360-64-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral1/memory/1360-65-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral1/memory/1360-87-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral1/memory/1000-88-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral1/memory/1000-89-0x0000000000400000-0x0000000000416000-memory.dmp	upx

Drops startup file 4 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bUxAdovD.exe	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bUxAdovD.exe	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bUxAdovD.exe	xCkxmkMM.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bUxAdovD.exe	xCkxmkMM.exe

Loads dropped DLL 3 IoCs

pid	Process
1360	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe
1360	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe
1508	xCkxmkMM.exe

Windows security modification 2 TTPs 6 IoCs

Disabling Security Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	xCkxmkMM.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	xCkxmkMM.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	xCkxmkMM.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallOverride = "1"	xCkxmkMM.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	xCkxmkMM.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UacDisableNotify = "1"	xCkxmkMM.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\jbuGLTTI = "C:\\Users\\Admin\\AppData\\Local\\Temp\\OZNXsfoW.exe"	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run	xCkxmkMM.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\jbuGLTTI = "C:\\Users\\Admin\\AppData\\Local\\Temp\\OZNXsfoW.exe"	xCkxmkMM.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

System Information Discovery

T1082

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	xCkxmkMM.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1228 set thread context of 1360	1228	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe	28
PID 1508 set thread context of 1000	1508	xCkxmkMM.exe	30

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Microsoft Sync Framework\zWhJDJln.exe	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe
File opened for modification	C:\Program Files (x86)\Microsoft Sync Framework\zWhJDJln.exe	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1228	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe
1228	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe
1508	xCkxmkMM.exe
1508	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe
1000	xCkxmkMM.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeSecurityPrivilege	1360	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe
Token: SeDebugPrivilege	1360	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe
Token: SeTcbPrivilege	1360	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe
Token: SeSecurityPrivilege	1000	xCkxmkMM.exe
Token: SeDebugPrivilege	1000	xCkxmkMM.exe
Token: SeTcbPrivilege	1000	xCkxmkMM.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
1228	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe
1228	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe
1508	xCkxmkMM.exe
1508	xCkxmkMM.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1228 wrote to memory of 1360	1228	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe	28
PID 1228 wrote to memory of 1360	1228	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe	28
PID 1228 wrote to memory of 1360	1228	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe	28
PID 1228 wrote to memory of 1360	1228	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe	28
PID 1228 wrote to memory of 1360	1228	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe	28
PID 1228 wrote to memory of 1360	1228	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe	28
PID 1228 wrote to memory of 1360	1228	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe	28
PID 1228 wrote to memory of 1360	1228	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe	28
PID 1360 wrote to memory of 1508	1360	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe	29
PID 1360 wrote to memory of 1508	1360	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe	29
PID 1360 wrote to memory of 1508	1360	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe	29
PID 1360 wrote to memory of 1508	1360	738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe	29
PID 1508 wrote to memory of 1000	1508	xCkxmkMM.exe	30
PID 1508 wrote to memory of 1000	1508	xCkxmkMM.exe	30
PID 1508 wrote to memory of 1000	1508	xCkxmkMM.exe	30
PID 1508 wrote to memory of 1000	1508	xCkxmkMM.exe	30
PID 1508 wrote to memory of 1000	1508	xCkxmkMM.exe	30
PID 1508 wrote to memory of 1000	1508	xCkxmkMM.exe	30
PID 1508 wrote to memory of 1000	1508	xCkxmkMM.exe	30
PID 1508 wrote to memory of 1000	1508	xCkxmkMM.exe	30

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	xCkxmkMM.exe

C:\Users\Admin\AppData\Local\Temp\738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe
"C:\Users\Admin\AppData\Local\Temp\738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1228
- C:\Users\Admin\AppData\Local\Temp\738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe
  C:\Users\Admin\AppData\Local\Temp\738d7c28ddf9fbd9ac8e7b93f8fd5699257d80b27852bc10681563699b69ce5a.exe
  2⤵
  - Modifies WinLogon for persistence
  - Drops startup file
  - Loads dropped DLL
  - Adds Run key to start application
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1360
- - C:\Users\Admin\AppData\Local\Temp\xCkxmkMM.exe
    "C:\Users\Admin\AppData\Local\Temp\xCkxmkMM.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1508
  - - C:\Users\Admin\AppData\Local\Temp\xCkxmkMM.exe
      C:\Users\Admin\AppData\Local\Temp\xCkxmkMM.exe
      4⤵
      Modifies firewall policy service
      Modifies security service
      UAC bypass
      Windows security bypass
      Executes dropped EXE
      Drops startup file
      Windows security modification
      Adds Run key to start application
      Checks whether UAC is enabled
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      System policy modification
      PID:1000

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Bypass User Account Control

T1088

Defense Evasion

Bypass User Account Control

T1088

Disabling Security Tools

Modify Registry