darkcomet | 300b2870be148cdec74fa42544a6669f7edc2e3cd6269f067fb5129e8f55f20c

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

Modifies security service 2 TTPs 1 IoCs

evasion

Modify Registry

Windows Service

T1543.003

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

Disables Task Manager via registry modification
evasion

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	GOlfito.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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	GOlfito.exe

Executes dropped EXE 3 IoCs

pid	Process
1176	MINIGOLF.EXE
2308	winupdate.exe
4852	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-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windows\\Windupdt\\winupdate.exe"	GOlfito.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 840 set thread context of 3756	840	GOlfito.exe	90
PID 2308 set thread context of 4852	2308	winupdate.exe	100

Drops file in Windows directory 4 IoCs

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

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 5 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	GOlfito.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	GOlfito.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MINIGOLF.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 opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	GOlfito.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	GOlfito.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	GOlfito.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	GOlfito.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

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	GOlfito.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\	GOlfito.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4852	winupdate.exe

Suspicious use of AdjustPrivilegeToken 50 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	3756	GOlfito.exe
Token: SeSecurityPrivilege	3756	GOlfito.exe
Token: SeTakeOwnershipPrivilege	3756	GOlfito.exe
Token: SeLoadDriverPrivilege	3756	GOlfito.exe
Token: SeSystemProfilePrivilege	3756	GOlfito.exe
Token: SeSystemtimePrivilege	3756	GOlfito.exe
Token: SeProfSingleProcessPrivilege	3756	GOlfito.exe
Token: SeIncBasePriorityPrivilege	3756	GOlfito.exe
Token: SeCreatePagefilePrivilege	3756	GOlfito.exe
Token: SeBackupPrivilege	3756	GOlfito.exe
Token: SeRestorePrivilege	3756	GOlfito.exe
Token: SeShutdownPrivilege	3756	GOlfito.exe
Token: SeDebugPrivilege	3756	GOlfito.exe
Token: SeSystemEnvironmentPrivilege	3756	GOlfito.exe
Token: SeChangeNotifyPrivilege	3756	GOlfito.exe
Token: SeRemoteShutdownPrivilege	3756	GOlfito.exe
Token: SeUndockPrivilege	3756	GOlfito.exe
Token: SeManageVolumePrivilege	3756	GOlfito.exe
Token: SeImpersonatePrivilege	3756	GOlfito.exe
Token: SeCreateGlobalPrivilege	3756	GOlfito.exe
Token: 33	3756	GOlfito.exe
Token: 34	3756	GOlfito.exe
Token: 35	3756	GOlfito.exe
Token: 36	3756	GOlfito.exe
Token: 33	1828	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1828	AUDIODG.EXE
Token: SeIncreaseQuotaPrivilege	4852	winupdate.exe
Token: SeSecurityPrivilege	4852	winupdate.exe
Token: SeTakeOwnershipPrivilege	4852	winupdate.exe
Token: SeLoadDriverPrivilege	4852	winupdate.exe
Token: SeSystemProfilePrivilege	4852	winupdate.exe
Token: SeSystemtimePrivilege	4852	winupdate.exe
Token: SeProfSingleProcessPrivilege	4852	winupdate.exe
Token: SeIncBasePriorityPrivilege	4852	winupdate.exe
Token: SeCreatePagefilePrivilege	4852	winupdate.exe
Token: SeBackupPrivilege	4852	winupdate.exe
Token: SeRestorePrivilege	4852	winupdate.exe
Token: SeShutdownPrivilege	4852	winupdate.exe
Token: SeDebugPrivilege	4852	winupdate.exe
Token: SeSystemEnvironmentPrivilege	4852	winupdate.exe
Token: SeChangeNotifyPrivilege	4852	winupdate.exe
Token: SeRemoteShutdownPrivilege	4852	winupdate.exe
Token: SeUndockPrivilege	4852	winupdate.exe
Token: SeManageVolumePrivilege	4852	winupdate.exe
Token: SeImpersonatePrivilege	4852	winupdate.exe
Token: SeCreateGlobalPrivilege	4852	winupdate.exe
Token: 33	4852	winupdate.exe
Token: 34	4852	winupdate.exe
Token: 35	4852	winupdate.exe
Token: 36	4852	winupdate.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
840	GOlfito.exe
2308	winupdate.exe
4852	winupdate.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 840 wrote to memory of 3756	840	GOlfito.exe	90
PID 840 wrote to memory of 3756	840	GOlfito.exe	90
PID 840 wrote to memory of 3756	840	GOlfito.exe	90
PID 840 wrote to memory of 3756	840	GOlfito.exe	90
PID 840 wrote to memory of 3756	840	GOlfito.exe	90
PID 840 wrote to memory of 3756	840	GOlfito.exe	90
PID 840 wrote to memory of 3756	840	GOlfito.exe	90
PID 840 wrote to memory of 3756	840	GOlfito.exe	90
PID 840 wrote to memory of 3756	840	GOlfito.exe	90
PID 840 wrote to memory of 3756	840	GOlfito.exe	90
PID 840 wrote to memory of 3756	840	GOlfito.exe	90
PID 840 wrote to memory of 3756	840	GOlfito.exe	90
PID 840 wrote to memory of 3756	840	GOlfito.exe	90
PID 840 wrote to memory of 3756	840	GOlfito.exe	90
PID 3756 wrote to memory of 1176	3756	GOlfito.exe	91
PID 3756 wrote to memory of 1176	3756	GOlfito.exe	91
PID 3756 wrote to memory of 1176	3756	GOlfito.exe	91
PID 3756 wrote to memory of 2308	3756	GOlfito.exe	95
PID 3756 wrote to memory of 2308	3756	GOlfito.exe	95
PID 3756 wrote to memory of 2308	3756	GOlfito.exe	95
PID 2308 wrote to memory of 4852	2308	winupdate.exe	100
PID 2308 wrote to memory of 4852	2308	winupdate.exe	100
PID 2308 wrote to memory of 4852	2308	winupdate.exe	100
PID 2308 wrote to memory of 4852	2308	winupdate.exe	100
PID 2308 wrote to memory of 4852	2308	winupdate.exe	100
PID 2308 wrote to memory of 4852	2308	winupdate.exe	100
PID 2308 wrote to memory of 4852	2308	winupdate.exe	100
PID 2308 wrote to memory of 4852	2308	winupdate.exe	100
PID 2308 wrote to memory of 4852	2308	winupdate.exe	100
PID 2308 wrote to memory of 4852	2308	winupdate.exe	100
PID 2308 wrote to memory of 4852	2308	winupdate.exe	100
PID 2308 wrote to memory of 4852	2308	winupdate.exe	100
PID 2308 wrote to memory of 4852	2308	winupdate.exe	100
PID 2308 wrote to memory of 4852	2308	winupdate.exe	100

C:\Users\Admin\AppData\Local\Temp\GOlfito.exe
"C:\Users\Admin\AppData\Local\Temp\GOlfito.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:840
- C:\Users\Admin\AppData\Local\Temp\GOlfito.exe
  "C:\Users\Admin\AppData\Local\Temp\GOlfito.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Checks computer location settings
  - Adds Run key to start application
  - Drops file in Windows directory
  - 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:3756
- - C:\Users\Admin\AppData\Local\Temp\MINIGOLF.EXE
    "C:\Users\Admin\AppData\Local\Temp\MINIGOLF.EXE"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1176
- - C:\Windows\Windupdt\winupdate.exe
    "C:\Windows\Windupdt\winupdate.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2308
  - - C:\Windows\Windupdt\winupdate.exe
      "C:\Windows\Windupdt\winupdate.exe"
      4⤵
      Modifies security 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 behavior: GetForegroundWindowSpam
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:4852

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x424 0x470
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1828

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