darkcomet | db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e

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\\Programs\\Windupdt\\winupdate.exe"	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe

Modifies firewall policy service 2 TTPs 3 IoCs

Modify Registry

Modify Existing Service

T1031

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

Modifies security service 2 TTPs 1 IoCs

Modify Registry

Modify Existing Service

T1031

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

Windows security bypass 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

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

Disables RegEdit via registry modification 1 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	winupdate.exe

Executes dropped EXE 2 IoCs

pid	Process
4608	winupdate.exe
2116	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	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.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-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

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

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Software\Microsoft\Windows\CurrentVersion\Run	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\AVGaddons = "C:\\ProgramData\\Microsoft\\Windows\\Start Menu\\Programs\\Windupdt\\winupdate.exe"	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Key created	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Software\Microsoft\Windows\CurrentVersion\Run	winupdate.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4132 set thread context of 4068	4132	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe	81
PID 4608 set thread context of 2116	4608	winupdate.exe	88

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

System Information Discovery
T1082

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\Identifier	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.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
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.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	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.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\	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2116	winupdate.exe

Suspicious use of AdjustPrivilegeToken 50 IoCs

description	pid	Process
Token: SeDebugPrivilege	4132	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Token: SeIncreaseQuotaPrivilege	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Token: SeSecurityPrivilege	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Token: SeTakeOwnershipPrivilege	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Token: SeLoadDriverPrivilege	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Token: SeSystemProfilePrivilege	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Token: SeSystemtimePrivilege	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Token: SeProfSingleProcessPrivilege	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Token: SeIncBasePriorityPrivilege	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Token: SeCreatePagefilePrivilege	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Token: SeBackupPrivilege	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Token: SeRestorePrivilege	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Token: SeShutdownPrivilege	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Token: SeDebugPrivilege	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Token: SeSystemEnvironmentPrivilege	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Token: SeChangeNotifyPrivilege	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Token: SeRemoteShutdownPrivilege	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Token: SeUndockPrivilege	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Token: SeManageVolumePrivilege	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Token: SeImpersonatePrivilege	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Token: SeCreateGlobalPrivilege	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Token: 33	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Token: 34	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Token: 35	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Token: 36	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
Token: SeDebugPrivilege	4608	winupdate.exe
Token: SeIncreaseQuotaPrivilege	2116	winupdate.exe
Token: SeSecurityPrivilege	2116	winupdate.exe
Token: SeTakeOwnershipPrivilege	2116	winupdate.exe
Token: SeLoadDriverPrivilege	2116	winupdate.exe
Token: SeSystemProfilePrivilege	2116	winupdate.exe
Token: SeSystemtimePrivilege	2116	winupdate.exe
Token: SeProfSingleProcessPrivilege	2116	winupdate.exe
Token: SeIncBasePriorityPrivilege	2116	winupdate.exe
Token: SeCreatePagefilePrivilege	2116	winupdate.exe
Token: SeBackupPrivilege	2116	winupdate.exe
Token: SeRestorePrivilege	2116	winupdate.exe
Token: SeShutdownPrivilege	2116	winupdate.exe
Token: SeDebugPrivilege	2116	winupdate.exe
Token: SeSystemEnvironmentPrivilege	2116	winupdate.exe
Token: SeChangeNotifyPrivilege	2116	winupdate.exe
Token: SeRemoteShutdownPrivilege	2116	winupdate.exe
Token: SeUndockPrivilege	2116	winupdate.exe
Token: SeManageVolumePrivilege	2116	winupdate.exe
Token: SeImpersonatePrivilege	2116	winupdate.exe
Token: SeCreateGlobalPrivilege	2116	winupdate.exe
Token: 33	2116	winupdate.exe
Token: 34	2116	winupdate.exe
Token: 35	2116	winupdate.exe
Token: 36	2116	winupdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2116	winupdate.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 4132 wrote to memory of 4068	4132	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe	81
PID 4132 wrote to memory of 4068	4132	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe	81
PID 4132 wrote to memory of 4068	4132	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe	81
PID 4132 wrote to memory of 4068	4132	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe	81
PID 4132 wrote to memory of 4068	4132	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe	81
PID 4132 wrote to memory of 4068	4132	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe	81
PID 4132 wrote to memory of 4068	4132	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe	81
PID 4132 wrote to memory of 4068	4132	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe	81
PID 4132 wrote to memory of 4068	4132	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe	81
PID 4132 wrote to memory of 4068	4132	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe	81
PID 4132 wrote to memory of 4068	4132	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe	81
PID 4132 wrote to memory of 4068	4132	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe	81
PID 4132 wrote to memory of 4068	4132	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe	81
PID 4132 wrote to memory of 4068	4132	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe	81
PID 4068 wrote to memory of 2132	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe	82
PID 4068 wrote to memory of 2132	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe	82
PID 4068 wrote to memory of 2132	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe	82
PID 4068 wrote to memory of 4608	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe	87
PID 4068 wrote to memory of 4608	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe	87
PID 4068 wrote to memory of 4608	4068	db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe	87
PID 4608 wrote to memory of 2116	4608	winupdate.exe	88
PID 4608 wrote to memory of 2116	4608	winupdate.exe	88
PID 4608 wrote to memory of 2116	4608	winupdate.exe	88
PID 4608 wrote to memory of 2116	4608	winupdate.exe	88
PID 4608 wrote to memory of 2116	4608	winupdate.exe	88
PID 4608 wrote to memory of 2116	4608	winupdate.exe	88
PID 4608 wrote to memory of 2116	4608	winupdate.exe	88
PID 4608 wrote to memory of 2116	4608	winupdate.exe	88
PID 4608 wrote to memory of 2116	4608	winupdate.exe	88
PID 4608 wrote to memory of 2116	4608	winupdate.exe	88
PID 4608 wrote to memory of 2116	4608	winupdate.exe	88
PID 4608 wrote to memory of 2116	4608	winupdate.exe	88
PID 4608 wrote to memory of 2116	4608	winupdate.exe	88
PID 4608 wrote to memory of 2116	4608	winupdate.exe	88
PID 2116 wrote to memory of 988	2116	winupdate.exe	89
PID 2116 wrote to memory of 988	2116	winupdate.exe	89
PID 2116 wrote to memory of 988	2116	winupdate.exe	89

System policy modification 1 TTPs 3 IoCs

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion\Explorern\NoControlPanel = "1"	winupdate.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion	winupdate.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion\Explorern	winupdate.exe

C:\Users\Admin\AppData\Local\Temp\db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
"C:\Users\Admin\AppData\Local\Temp\db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4132
- C:\Users\Admin\AppData\Local\Temp\db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe
  "C:\Users\Admin\AppData\Local\Temp\db26143efb7030d295238bd11c3004fd42ccb1157c8228c156b5b5fcf36bca2e.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Checks computer location settings
  - Adds Run key to start application
  - Checks processor information in registry
  - Enumerates system info in registry
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4068
- - C:\Windows\SysWOW64\explorer.exe
    "C:\Windows\SysWOW64\explorer.exe"
    3⤵
    PID:2132
- - C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Windupdt\winupdate.exe
    "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Windupdt\winupdate.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4608
  - - C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Windupdt\winupdate.exe
      "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Windupdt\winupdate.exe"
      4⤵
      Modifies firewall policy service
      Modifies security service
      Windows security bypass
      Disables RegEdit via registry modification
      Executes dropped EXE
      Checks BIOS information in registry
      Windows security modification
      Adds Run key to start application
      Checks processor information in registry
      Enumerates system info in registry
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      System policy modification
      PID:2116
    - - C:\Windows\SysWOW64\explorer.exe
        
        "C:\Windows\SysWOW64\explorer.exe"
        5⤵
        
        PID:988

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Disabling Security Tools

T1089

Modify Registry

Credential Access

Discovery

Query Registry

System Information Discovery