darkcomet | e3b98c6377aedde14ae5dae49e9a7ce7e6bbfc5021537317fe4c071d544999d8

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

Modifies firewall policy service 3 TTPs 3 IoCs

defense_evasion

Modify Registry

Windows Service

Disable or Modify System Firewall

T1562.004

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

Modifies security service 2 TTPs 1 IoCs

defense_evasion

Modify Registry

Windows Service

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

Windows security bypass 2 TTPs 2 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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "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	Dc Server.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	explorer.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1121399784-3202166597-3503557106-1000\Control Panel\International\Geo\Nation	JaffaCakes118_aba0b440dd25c7f3d8a009009a6abc25.exe

Drops startup file 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Dc Server.exe	JaffaCakes118_aba0b440dd25c7f3d8a009009a6abc25.exe

Executes dropped EXE 1 IoCs

pid	Process
4640	Dc Server.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1121399784-3202166597-3503557106-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe"	Dc Server.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1121399784-3202166597-3503557106-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windefender = "C:/Users/Admin/AppData/Roaming/Microsoft/Windows/Start Menu/Programs/Startup//Dc Server.exe"	JaffaCakes118_aba0b440dd25c7f3d8a009009a6abc25.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4640 set thread context of 1988	4640	Dc Server.exe	87

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 3 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	JaffaCakes118_aba0b440dd25c7f3d8a009009a6abc25.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Dc Server.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.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	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
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	explorer.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	Dc Server.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	Dc Server.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	Dc Server.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	Dc Server.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	Dc Server.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	explorer.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1988	explorer.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	4640	Dc Server.exe
Token: SeSecurityPrivilege	4640	Dc Server.exe
Token: SeTakeOwnershipPrivilege	4640	Dc Server.exe
Token: SeLoadDriverPrivilege	4640	Dc Server.exe
Token: SeSystemProfilePrivilege	4640	Dc Server.exe
Token: SeSystemtimePrivilege	4640	Dc Server.exe
Token: SeProfSingleProcessPrivilege	4640	Dc Server.exe
Token: SeIncBasePriorityPrivilege	4640	Dc Server.exe
Token: SeCreatePagefilePrivilege	4640	Dc Server.exe
Token: SeBackupPrivilege	4640	Dc Server.exe
Token: SeRestorePrivilege	4640	Dc Server.exe
Token: SeShutdownPrivilege	4640	Dc Server.exe
Token: SeDebugPrivilege	4640	Dc Server.exe
Token: SeSystemEnvironmentPrivilege	4640	Dc Server.exe
Token: SeChangeNotifyPrivilege	4640	Dc Server.exe
Token: SeRemoteShutdownPrivilege	4640	Dc Server.exe
Token: SeUndockPrivilege	4640	Dc Server.exe
Token: SeManageVolumePrivilege	4640	Dc Server.exe
Token: SeImpersonatePrivilege	4640	Dc Server.exe
Token: SeCreateGlobalPrivilege	4640	Dc Server.exe
Token: 33	4640	Dc Server.exe
Token: 34	4640	Dc Server.exe
Token: 35	4640	Dc Server.exe
Token: 36	4640	Dc Server.exe
Token: SeIncreaseQuotaPrivilege	1988	explorer.exe
Token: SeSecurityPrivilege	1988	explorer.exe
Token: SeTakeOwnershipPrivilege	1988	explorer.exe
Token: SeLoadDriverPrivilege	1988	explorer.exe
Token: SeSystemProfilePrivilege	1988	explorer.exe
Token: SeSystemtimePrivilege	1988	explorer.exe
Token: SeProfSingleProcessPrivilege	1988	explorer.exe
Token: SeIncBasePriorityPrivilege	1988	explorer.exe
Token: SeCreatePagefilePrivilege	1988	explorer.exe
Token: SeBackupPrivilege	1988	explorer.exe
Token: SeRestorePrivilege	1988	explorer.exe
Token: SeShutdownPrivilege	1988	explorer.exe
Token: SeDebugPrivilege	1988	explorer.exe
Token: SeSystemEnvironmentPrivilege	1988	explorer.exe
Token: SeChangeNotifyPrivilege	1988	explorer.exe
Token: SeRemoteShutdownPrivilege	1988	explorer.exe
Token: SeUndockPrivilege	1988	explorer.exe
Token: SeManageVolumePrivilege	1988	explorer.exe
Token: SeImpersonatePrivilege	1988	explorer.exe
Token: SeCreateGlobalPrivilege	1988	explorer.exe
Token: 33	1988	explorer.exe
Token: 34	1988	explorer.exe
Token: 35	1988	explorer.exe
Token: 36	1988	explorer.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1576	JaffaCakes118_aba0b440dd25c7f3d8a009009a6abc25.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1576 wrote to memory of 4640	1576	JaffaCakes118_aba0b440dd25c7f3d8a009009a6abc25.exe	86
PID 1576 wrote to memory of 4640	1576	JaffaCakes118_aba0b440dd25c7f3d8a009009a6abc25.exe	86
PID 1576 wrote to memory of 4640	1576	JaffaCakes118_aba0b440dd25c7f3d8a009009a6abc25.exe	86
PID 4640 wrote to memory of 1988	4640	Dc Server.exe	87
PID 4640 wrote to memory of 1988	4640	Dc Server.exe	87
PID 4640 wrote to memory of 1988	4640	Dc Server.exe	87
PID 4640 wrote to memory of 1988	4640	Dc Server.exe	87
PID 4640 wrote to memory of 1988	4640	Dc Server.exe	87

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_aba0b440dd25c7f3d8a009009a6abc25.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_aba0b440dd25c7f3d8a009009a6abc25.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1576
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Dc Server.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Dc Server.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Adds Run key to start application
  - 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:4640
- - C:\Windows\SysWOW64\explorer.exe
    "C:\Windows\SysWOW64\explorer.exe"
    3⤵
    - Modifies firewall policy service
    - 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
    PID:1988

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

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

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Disable or Modify Tools

T1562.001

Modify Registry

Credential Access

Discovery

Query Registry

System Information Discovery