darkcomet | ca58eb07c19f66b1ee982432905a9c26a0256fa86409144eccbe6b52e7d30bf9

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\Windupdt\\winupdate.exe"	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe

Modifies security service 2 TTPs 1 IoCs

defense_evasion

Modify Registry

Windows Service

T1543.003

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4"	explorer.exe

Windows security bypass 2 TTPs 1 IoCs

defense_evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	explorer.exe

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	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	explorer.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-1-5-21-2593460650-190333679-3676257533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windows\\system32\\Windupdt\\winupdate.exe"	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Windupdt\winupdate.exe	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
File opened for modification	C:\Windows\SysWOW64\Windupdt\winupdate.exe	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
File opened for modification	C:\Windows\SysWOW64\Windupdt\	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2184 set thread context of 2236	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe	87

UPX packed file 14 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2184-0-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-5-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-6-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-8-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-11-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-12-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2184-10-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-7-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-16-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-18-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-15-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-14-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-17-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-19-0x0000000000400000-0x00000000004B5000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 2 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	explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.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	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	explorer.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	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	explorer.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2236	explorer.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Token: SeSecurityPrivilege	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Token: SeTakeOwnershipPrivilege	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Token: SeLoadDriverPrivilege	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Token: SeSystemProfilePrivilege	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Token: SeSystemtimePrivilege	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Token: SeProfSingleProcessPrivilege	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Token: SeIncBasePriorityPrivilege	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Token: SeCreatePagefilePrivilege	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Token: SeBackupPrivilege	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Token: SeRestorePrivilege	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Token: SeShutdownPrivilege	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Token: SeDebugPrivilege	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Token: SeSystemEnvironmentPrivilege	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Token: SeChangeNotifyPrivilege	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Token: SeRemoteShutdownPrivilege	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Token: SeUndockPrivilege	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Token: SeManageVolumePrivilege	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Token: SeImpersonatePrivilege	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Token: SeCreateGlobalPrivilege	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Token: 33	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Token: 34	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Token: 35	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Token: 36	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
Token: SeIncreaseQuotaPrivilege	2236	explorer.exe
Token: SeSecurityPrivilege	2236	explorer.exe
Token: SeTakeOwnershipPrivilege	2236	explorer.exe
Token: SeLoadDriverPrivilege	2236	explorer.exe
Token: SeSystemProfilePrivilege	2236	explorer.exe
Token: SeSystemtimePrivilege	2236	explorer.exe
Token: SeProfSingleProcessPrivilege	2236	explorer.exe
Token: SeIncBasePriorityPrivilege	2236	explorer.exe
Token: SeCreatePagefilePrivilege	2236	explorer.exe
Token: SeBackupPrivilege	2236	explorer.exe
Token: SeRestorePrivilege	2236	explorer.exe
Token: SeShutdownPrivilege	2236	explorer.exe
Token: SeDebugPrivilege	2236	explorer.exe
Token: SeSystemEnvironmentPrivilege	2236	explorer.exe
Token: SeChangeNotifyPrivilege	2236	explorer.exe
Token: SeRemoteShutdownPrivilege	2236	explorer.exe
Token: SeUndockPrivilege	2236	explorer.exe
Token: SeManageVolumePrivilege	2236	explorer.exe
Token: SeImpersonatePrivilege	2236	explorer.exe
Token: SeCreateGlobalPrivilege	2236	explorer.exe
Token: 33	2236	explorer.exe
Token: 34	2236	explorer.exe
Token: 35	2236	explorer.exe
Token: 36	2236	explorer.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2236	explorer.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2184 wrote to memory of 2236	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe	87
PID 2184 wrote to memory of 2236	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe	87
PID 2184 wrote to memory of 2236	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe	87
PID 2184 wrote to memory of 2236	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe	87
PID 2184 wrote to memory of 2236	2184	JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe	87

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0772f4e7277a21b56bf40cad4cf725a9.exe"
1⤵
- Modifies WinLogon for persistence
- Checks BIOS information in registry
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of SetThreadContext
- 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:2184
- C:\Windows\SysWOW64\explorer.exe
  "C:\Windows\SysWOW64\explorer.exe"
  2⤵
  - Modifies security service
  - Windows security bypass
  - Checks BIOS information in registry
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:2236

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 Tools

T1562.001

Modify Registry

Credential Access

Discovery

Query Registry

System Information Discovery