darkcomet | 303cfc0ae7efa5ca9e83da9e2ff453d789b6c145ab20c3295a8b80897926ba0b

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\AppData\\Roaming\\Windupdt\\winupdate.exe"	f39ddcb42f54dbd955b798ed1bb3379a_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
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "1"	winupdate.exe
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

Windows security bypass 2 TTPs 1 IoCs

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"	winupdate.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	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	winupdate.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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe

Executes dropped EXE 2 IoCs

pid	Process
2924	winupdate.exe
1116	winupdate.exe

Windows security modification 2 TTPs 1 IoCs

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"	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-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Users\\Admin\\AppData\\Roaming\\Windupdt\\winupdate.exe"	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2112 set thread context of 1592	2112	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe	83
PID 2924 set thread context of 1116	2924	winupdate.exe	86

UPX packed file 31 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1592-2-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1592-4-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1592-5-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1592-6-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1592-7-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1592-8-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1592-9-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1592-70-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1116-81-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1116-82-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1116-83-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1116-86-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1116-85-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1116-84-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1116-79-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1116-80-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1116-87-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1116-88-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1116-89-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1116-90-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1116-91-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1116-92-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1116-93-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1116-94-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1116-95-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1116-96-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1116-97-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1116-98-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1116-99-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1116-100-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1116-101-0x0000000000400000-0x00000000004B5000-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 4 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	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.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 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
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	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	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	winupdate.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Token: SeSecurityPrivilege	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Token: SeTakeOwnershipPrivilege	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Token: SeLoadDriverPrivilege	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Token: SeSystemProfilePrivilege	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Token: SeSystemtimePrivilege	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Token: SeProfSingleProcessPrivilege	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Token: SeIncBasePriorityPrivilege	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Token: SeCreatePagefilePrivilege	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Token: SeBackupPrivilege	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Token: SeRestorePrivilege	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Token: SeShutdownPrivilege	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Token: SeDebugPrivilege	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Token: SeSystemEnvironmentPrivilege	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Token: SeChangeNotifyPrivilege	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Token: SeRemoteShutdownPrivilege	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Token: SeUndockPrivilege	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Token: SeManageVolumePrivilege	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Token: SeImpersonatePrivilege	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Token: SeCreateGlobalPrivilege	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Token: 33	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Token: 34	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Token: 35	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Token: 36	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
Token: SeIncreaseQuotaPrivilege	1116	winupdate.exe
Token: SeSecurityPrivilege	1116	winupdate.exe
Token: SeTakeOwnershipPrivilege	1116	winupdate.exe
Token: SeLoadDriverPrivilege	1116	winupdate.exe
Token: SeSystemProfilePrivilege	1116	winupdate.exe
Token: SeSystemtimePrivilege	1116	winupdate.exe
Token: SeProfSingleProcessPrivilege	1116	winupdate.exe
Token: SeIncBasePriorityPrivilege	1116	winupdate.exe
Token: SeCreatePagefilePrivilege	1116	winupdate.exe
Token: SeBackupPrivilege	1116	winupdate.exe
Token: SeRestorePrivilege	1116	winupdate.exe
Token: SeShutdownPrivilege	1116	winupdate.exe
Token: SeDebugPrivilege	1116	winupdate.exe
Token: SeSystemEnvironmentPrivilege	1116	winupdate.exe
Token: SeChangeNotifyPrivilege	1116	winupdate.exe
Token: SeRemoteShutdownPrivilege	1116	winupdate.exe
Token: SeUndockPrivilege	1116	winupdate.exe
Token: SeManageVolumePrivilege	1116	winupdate.exe
Token: SeImpersonatePrivilege	1116	winupdate.exe
Token: SeCreateGlobalPrivilege	1116	winupdate.exe
Token: 33	1116	winupdate.exe
Token: 34	1116	winupdate.exe
Token: 35	1116	winupdate.exe
Token: 36	1116	winupdate.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2112	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
2924	winupdate.exe
1116	winupdate.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2112 wrote to memory of 1592	2112	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe	83
PID 2112 wrote to memory of 1592	2112	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe	83
PID 2112 wrote to memory of 1592	2112	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe	83
PID 2112 wrote to memory of 1592	2112	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe	83
PID 2112 wrote to memory of 1592	2112	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe	83
PID 2112 wrote to memory of 1592	2112	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe	83
PID 2112 wrote to memory of 1592	2112	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe	83
PID 2112 wrote to memory of 1592	2112	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe	83
PID 1592 wrote to memory of 3896	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe	84
PID 1592 wrote to memory of 3896	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe	84
PID 1592 wrote to memory of 3896	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe	84
PID 1592 wrote to memory of 2924	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe	85
PID 1592 wrote to memory of 2924	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe	85
PID 1592 wrote to memory of 2924	1592	f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe	85
PID 2924 wrote to memory of 1116	2924	winupdate.exe	86
PID 2924 wrote to memory of 1116	2924	winupdate.exe	86
PID 2924 wrote to memory of 1116	2924	winupdate.exe	86
PID 2924 wrote to memory of 1116	2924	winupdate.exe	86
PID 2924 wrote to memory of 1116	2924	winupdate.exe	86
PID 2924 wrote to memory of 1116	2924	winupdate.exe	86
PID 2924 wrote to memory of 1116	2924	winupdate.exe	86
PID 2924 wrote to memory of 1116	2924	winupdate.exe	86
PID 1116 wrote to memory of 2556	1116	winupdate.exe	87
PID 1116 wrote to memory of 2556	1116	winupdate.exe	87
PID 1116 wrote to memory of 2556	1116	winupdate.exe	87

C:\Users\Admin\AppData\Local\Temp\f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2112
- C:\Users\Admin\AppData\Local\Temp\f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
  C:\Users\Admin\AppData\Local\Temp\f39ddcb42f54dbd955b798ed1bb3379a_JaffaCakes118.exe
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Enumerates system info in registry
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1592
- - C:\Windows\SysWOW64\explorer.exe
    "C:\Windows\SysWOW64\explorer.exe"
    3⤵
    PID:3896
- - C:\Users\Admin\AppData\Roaming\Windupdt\winupdate.exe
    "C:\Users\Admin\AppData\Roaming\Windupdt\winupdate.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2924
  - - C:\Users\Admin\AppData\Roaming\Windupdt\winupdate.exe
      C:\Users\Admin\AppData\Roaming\Windupdt\winupdate.exe
      4⤵
      Modifies firewall policy service
      Windows security bypass
      Checks BIOS information in registry
      Executes dropped EXE
      Windows security modification
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Enumerates system info in registry
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:1116
    - - C:\Windows\SysWOW64\explorer.exe
        
        "C:\Windows\SysWOW64\explorer.exe"
        5⤵
        
        PID:2556

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

Disable or Modify Tools

T1562.001

Modify Registry

Credential Access

Discovery

Query Registry

System Information Discovery