darkcomet | a2b7577b883311a9d059a719d269f1f5fc0abc30efaa7ba912925c5ba40681cc

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\ProgramData\\Microsoft\\Windows\\Start Menu\\Windupdt\\winupdate.exe"	94d7bc9e260423579441e97426115344_JaffaCakes118.exe

Modifies firewall policy service 3 TTPs 3 IoCs

evasion

Modify Registry

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

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

Disables RegEdit via registry modification 1 IoCs

evasion

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	winupdate.exe

Disables Task Manager via registry modification
evasion

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	winupdate.exe

Executes dropped EXE 3 IoCs

pid	Process
2084	HOOKENGINE.EXE
1520	winupdate.exe
2812	winupdate.exe

Loads dropped DLL 9 IoCs

pid	Process
2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
1520	winupdate.exe
1520	winupdate.exe
1520	winupdate.exe
1520	winupdate.exe
2812	winupdate.exe
2812	winupdate.exe
2812	winupdate.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\ProgramData\\Microsoft\\Windows\\Start Menu\\Windupdt\\winupdate.exe"	94d7bc9e260423579441e97426115344_JaffaCakes118.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2532 set thread context of 2552	2532	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	30
PID 1520 set thread context of 2812	1520	winupdate.exe	33

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2532-0-0x0000000000400000-0x000000000052E000-memory.dmp	upx
behavioral1/memory/2532-5-0x0000000000400000-0x000000000052E000-memory.dmp	upx
behavioral1/files/0x0008000000015d64-26.dat	upx
behavioral1/memory/1520-35-0x0000000000400000-0x000000000052E000-memory.dmp	upx
behavioral1/memory/1520-54-0x0000000000400000-0x000000000052E000-memory.dmp	upx

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	HOOKENGINE.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winupdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winupdate.exe

Checks processor information in registry 2 TTPs 8 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	winupdate.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	winupdate.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2812	winupdate.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeSecurityPrivilege	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeTakeOwnershipPrivilege	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeLoadDriverPrivilege	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeSystemProfilePrivilege	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeSystemtimePrivilege	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeProfSingleProcessPrivilege	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeIncBasePriorityPrivilege	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeCreatePagefilePrivilege	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeBackupPrivilege	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeRestorePrivilege	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeShutdownPrivilege	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeDebugPrivilege	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeSystemEnvironmentPrivilege	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeChangeNotifyPrivilege	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeRemoteShutdownPrivilege	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeUndockPrivilege	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeManageVolumePrivilege	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeImpersonatePrivilege	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeCreateGlobalPrivilege	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: 33	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: 34	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: 35	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: 33	2084	HOOKENGINE.EXE
Token: SeIncBasePriorityPrivilege	2084	HOOKENGINE.EXE
Token: SeIncreaseQuotaPrivilege	2812	winupdate.exe
Token: SeSecurityPrivilege	2812	winupdate.exe
Token: SeTakeOwnershipPrivilege	2812	winupdate.exe
Token: SeLoadDriverPrivilege	2812	winupdate.exe
Token: SeSystemProfilePrivilege	2812	winupdate.exe
Token: SeSystemtimePrivilege	2812	winupdate.exe
Token: SeProfSingleProcessPrivilege	2812	winupdate.exe
Token: SeIncBasePriorityPrivilege	2812	winupdate.exe
Token: SeCreatePagefilePrivilege	2812	winupdate.exe
Token: SeBackupPrivilege	2812	winupdate.exe
Token: SeRestorePrivilege	2812	winupdate.exe
Token: SeShutdownPrivilege	2812	winupdate.exe
Token: SeDebugPrivilege	2812	winupdate.exe
Token: SeSystemEnvironmentPrivilege	2812	winupdate.exe
Token: SeChangeNotifyPrivilege	2812	winupdate.exe
Token: SeRemoteShutdownPrivilege	2812	winupdate.exe
Token: SeUndockPrivilege	2812	winupdate.exe
Token: SeManageVolumePrivilege	2812	winupdate.exe
Token: SeImpersonatePrivilege	2812	winupdate.exe
Token: SeCreateGlobalPrivilege	2812	winupdate.exe
Token: 33	2812	winupdate.exe
Token: 34	2812	winupdate.exe
Token: 35	2812	winupdate.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2532	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
1520	winupdate.exe

Suspicious use of WriteProcessMemory 44 IoCs

description	pid	Process	procid_target
PID 2532 wrote to memory of 2552	2532	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	30
PID 2532 wrote to memory of 2552	2532	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	30
PID 2532 wrote to memory of 2552	2532	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	30
PID 2532 wrote to memory of 2552	2532	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	30
PID 2532 wrote to memory of 2552	2532	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	30
PID 2532 wrote to memory of 2552	2532	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	30
PID 2532 wrote to memory of 2552	2532	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	30
PID 2532 wrote to memory of 2552	2532	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	30
PID 2532 wrote to memory of 2552	2532	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	30
PID 2532 wrote to memory of 2552	2532	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	30
PID 2532 wrote to memory of 2552	2532	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	30
PID 2532 wrote to memory of 2552	2532	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	30
PID 2532 wrote to memory of 2552	2532	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	30
PID 2532 wrote to memory of 2552	2532	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	30
PID 2532 wrote to memory of 2552	2532	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	30
PID 2552 wrote to memory of 2084	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	31
PID 2552 wrote to memory of 2084	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	31
PID 2552 wrote to memory of 2084	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	31
PID 2552 wrote to memory of 2084	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	31
PID 2552 wrote to memory of 1520	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	32
PID 2552 wrote to memory of 1520	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	32
PID 2552 wrote to memory of 1520	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	32
PID 2552 wrote to memory of 1520	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	32
PID 2552 wrote to memory of 1520	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	32
PID 2552 wrote to memory of 1520	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	32
PID 2552 wrote to memory of 1520	2552	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	32
PID 1520 wrote to memory of 2812	1520	winupdate.exe	33
PID 1520 wrote to memory of 2812	1520	winupdate.exe	33
PID 1520 wrote to memory of 2812	1520	winupdate.exe	33
PID 1520 wrote to memory of 2812	1520	winupdate.exe	33
PID 1520 wrote to memory of 2812	1520	winupdate.exe	33
PID 1520 wrote to memory of 2812	1520	winupdate.exe	33
PID 1520 wrote to memory of 2812	1520	winupdate.exe	33
PID 1520 wrote to memory of 2812	1520	winupdate.exe	33
PID 1520 wrote to memory of 2812	1520	winupdate.exe	33
PID 1520 wrote to memory of 2812	1520	winupdate.exe	33
PID 1520 wrote to memory of 2812	1520	winupdate.exe	33
PID 1520 wrote to memory of 2812	1520	winupdate.exe	33
PID 1520 wrote to memory of 2812	1520	winupdate.exe	33
PID 1520 wrote to memory of 2812	1520	winupdate.exe	33
PID 1520 wrote to memory of 2812	1520	winupdate.exe	33
PID 1520 wrote to memory of 2812	1520	winupdate.exe	33
PID 1520 wrote to memory of 2812	1520	winupdate.exe	33
PID 1520 wrote to memory of 2812	1520	winupdate.exe	33

C:\Users\Admin\AppData\Local\Temp\94d7bc9e260423579441e97426115344_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\94d7bc9e260423579441e97426115344_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2532
- C:\Users\Admin\AppData\Local\Temp\94d7bc9e260423579441e97426115344_JaffaCakes118.exe
  C:\Users\Admin\AppData\Local\Temp\94d7bc9e260423579441e97426115344_JaffaCakes118.exe
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Loads dropped DLL
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2552
- - C:\Users\Admin\AppData\Local\Temp\HOOKENGINE.EXE
    "C:\Users\Admin\AppData\Local\Temp\HOOKENGINE.EXE"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2084
- - C:\ProgramData\Microsoft\Windows\Start Menu\Windupdt\winupdate.exe
    "C:\ProgramData\Microsoft\Windows\Start Menu\Windupdt\winupdate.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1520
  - - C:\ProgramData\Microsoft\Windows\Start Menu\Windupdt\winupdate.exe
      "C:\ProgramData\Microsoft\Windows\Start Menu\Windupdt\winupdate.exe"
      4⤵
      Modifies firewall policy service
      Disables RegEdit via registry modification
      Checks BIOS information in registry
      Executes dropped EXE
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Enumerates system info in registry
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of AdjustPrivilegeToken
      PID:2812

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

Credential Access

Discovery

Query Registry

System Information Discovery