darkcomet | 411c69fb7d314fc4459925b38828f0fc88ac4a176a73959f629d573aa93c7349

General

Target
a41431099989b44359273216072f8295.exe
Size 732KB
Sample240225-scea5aeb78
SHA256 411c69fb7d314fc4459925b38828f0fc88ac4a176a73959f629d573aa93c7349
MD5 a41431099989b44359273216072f8295
SHA1 2305142ed64ee41518ee0e0391723d316d9731bd
SHA512 9d455d178860baeb49b73df4a306cd6fbfb472d30ee80478e3eaaabdfe4d4cf26c74785dbeafdd889337ab9fa37e3baec3cbc690e9f7790f8bd0e2789f7cb610
SSDEEP 12288:8pwABK90BOe/x9lPAYvxPQVjdsAY2XjWlnlpTMMXG91uhKIXn/4:GwAcu99lPzvxP+Bsz2XjWTRMQckkIXnw
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

darkcomet persistence rat trojan

Malware Config

Signatures

Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
trojan rat darkcomet

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windupdt\\win32.dll"	a41431099989b44359273216072f8295.exe

Checks BIOS information in registry 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	a41431099989b44359273216072f8295.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3316742141-2240921845-2885234760-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\win32.dll"	a41431099989b44359273216072f8295.exe

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 4 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	a41431099989b44359273216072f8295.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	a41431099989b44359273216072f8295.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	a41431099989b44359273216072f8295.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	a41431099989b44359273216072f8295.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	a41431099989b44359273216072f8295.exe

Suspicious use of AdjustPrivilegeToken 24 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1372	a41431099989b44359273216072f8295.exe
Token: SeSecurityPrivilege	1372	a41431099989b44359273216072f8295.exe
Token: SeTakeOwnershipPrivilege	1372	a41431099989b44359273216072f8295.exe
Token: SeLoadDriverPrivilege	1372	a41431099989b44359273216072f8295.exe
Token: SeSystemProfilePrivilege	1372	a41431099989b44359273216072f8295.exe
Token: SeSystemtimePrivilege	1372	a41431099989b44359273216072f8295.exe
Token: SeProfSingleProcessPrivilege	1372	a41431099989b44359273216072f8295.exe
Token: SeIncBasePriorityPrivilege	1372	a41431099989b44359273216072f8295.exe
Token: SeCreatePagefilePrivilege	1372	a41431099989b44359273216072f8295.exe
Token: SeBackupPrivilege	1372	a41431099989b44359273216072f8295.exe
Token: SeRestorePrivilege	1372	a41431099989b44359273216072f8295.exe
Token: SeShutdownPrivilege	1372	a41431099989b44359273216072f8295.exe
Token: SeDebugPrivilege	1372	a41431099989b44359273216072f8295.exe
Token: SeSystemEnvironmentPrivilege	1372	a41431099989b44359273216072f8295.exe
Token: SeChangeNotifyPrivilege	1372	a41431099989b44359273216072f8295.exe
Token: SeRemoteShutdownPrivilege	1372	a41431099989b44359273216072f8295.exe
Token: SeUndockPrivilege	1372	a41431099989b44359273216072f8295.exe
Token: SeManageVolumePrivilege	1372	a41431099989b44359273216072f8295.exe
Token: SeImpersonatePrivilege	1372	a41431099989b44359273216072f8295.exe
Token: SeCreateGlobalPrivilege	1372	a41431099989b44359273216072f8295.exe
Token: 33	1372	a41431099989b44359273216072f8295.exe
Token: 34	1372	a41431099989b44359273216072f8295.exe
Token: 35	1372	a41431099989b44359273216072f8295.exe
Token: 36	1372	a41431099989b44359273216072f8295.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1372 wrote to memory of 1404	1372	a41431099989b44359273216072f8295.exe	87
PID 1372 wrote to memory of 1404	1372	a41431099989b44359273216072f8295.exe	87
PID 1372 wrote to memory of 1404	1372	a41431099989b44359273216072f8295.exe	87

C:\Users\Admin\AppData\Local\Temp\a41431099989b44359273216072f8295.exe
"C:\Users\Admin\AppData\Local\Temp\a41431099989b44359273216072f8295.exe"
1⤵
- Modifies WinLogon for persistence
- Checks BIOS information in registry
- Adds Run key to start application
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1372
- C:\Windows\SysWOW64\explorer.exe
  "C:\Windows\SysWOW64\explorer.exe"
  2⤵
  PID:1404