darkcomet | e7f623cc90369141f45b02da8a9356696fab3e633d4ed695100450d738659372

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windupdt\\winupdate.exe"	739e065498d059c844eefc77fc7b24f9.exe

Modifies firewall policy service 2 TTPs 3 IoCs

Modify Registry

Windows Service

description	ioc	Process
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 = "0"	winupdate.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "0"	winupdate.exe

Modifies security service 2 TTPs 1 IoCs

Modify Registry

Windows Service

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

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

Hidden Files and Directories

T1564.001

pid	Process
4040	attrib.exe
412	attrib.exe

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation	739e065498d059c844eefc77fc7b24f9.exe

Executes dropped EXE 2 IoCs

pid	Process
3684	winupdate.exe
3828	winupdate.exe

UPX packed file 27 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2728-2-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/2728-4-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/2728-5-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/2728-6-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/2728-7-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/2728-70-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/3828-77-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/3828-79-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/3828-80-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/3828-82-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/3828-83-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/3828-84-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/3828-85-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/3828-86-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/3828-87-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/3828-88-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/3828-89-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/3828-90-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/3828-91-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/3828-92-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/3828-93-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/3828-94-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/3828-95-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/3828-96-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/3828-97-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/3828-98-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/3828-99-0x0000000000400000-0x00000000004BA000-memory.dmp	upx

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 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-983843758-932321429-1636175382-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe"	739e065498d059c844eefc77fc7b24f9.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-983843758-932321429-1636175382-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe"	winupdate.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4552 set thread context of 2728	4552	739e065498d059c844eefc77fc7b24f9.exe	88
PID 3684 set thread context of 3828	3684	winupdate.exe	100

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	739e065498d059c844eefc77fc7b24f9.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1340	PING.EXE

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2728	739e065498d059c844eefc77fc7b24f9.exe
Token: SeSecurityPrivilege	2728	739e065498d059c844eefc77fc7b24f9.exe
Token: SeTakeOwnershipPrivilege	2728	739e065498d059c844eefc77fc7b24f9.exe
Token: SeLoadDriverPrivilege	2728	739e065498d059c844eefc77fc7b24f9.exe
Token: SeSystemProfilePrivilege	2728	739e065498d059c844eefc77fc7b24f9.exe
Token: SeSystemtimePrivilege	2728	739e065498d059c844eefc77fc7b24f9.exe
Token: SeProfSingleProcessPrivilege	2728	739e065498d059c844eefc77fc7b24f9.exe
Token: SeIncBasePriorityPrivilege	2728	739e065498d059c844eefc77fc7b24f9.exe
Token: SeCreatePagefilePrivilege	2728	739e065498d059c844eefc77fc7b24f9.exe
Token: SeBackupPrivilege	2728	739e065498d059c844eefc77fc7b24f9.exe
Token: SeRestorePrivilege	2728	739e065498d059c844eefc77fc7b24f9.exe
Token: SeShutdownPrivilege	2728	739e065498d059c844eefc77fc7b24f9.exe
Token: SeDebugPrivilege	2728	739e065498d059c844eefc77fc7b24f9.exe
Token: SeSystemEnvironmentPrivilege	2728	739e065498d059c844eefc77fc7b24f9.exe
Token: SeChangeNotifyPrivilege	2728	739e065498d059c844eefc77fc7b24f9.exe
Token: SeRemoteShutdownPrivilege	2728	739e065498d059c844eefc77fc7b24f9.exe
Token: SeUndockPrivilege	2728	739e065498d059c844eefc77fc7b24f9.exe
Token: SeManageVolumePrivilege	2728	739e065498d059c844eefc77fc7b24f9.exe
Token: SeImpersonatePrivilege	2728	739e065498d059c844eefc77fc7b24f9.exe
Token: SeCreateGlobalPrivilege	2728	739e065498d059c844eefc77fc7b24f9.exe
Token: 33	2728	739e065498d059c844eefc77fc7b24f9.exe
Token: 34	2728	739e065498d059c844eefc77fc7b24f9.exe
Token: 35	2728	739e065498d059c844eefc77fc7b24f9.exe
Token: 36	2728	739e065498d059c844eefc77fc7b24f9.exe
Token: SeIncreaseQuotaPrivilege	3828	winupdate.exe
Token: SeSecurityPrivilege	3828	winupdate.exe
Token: SeTakeOwnershipPrivilege	3828	winupdate.exe
Token: SeLoadDriverPrivilege	3828	winupdate.exe
Token: SeSystemProfilePrivilege	3828	winupdate.exe
Token: SeSystemtimePrivilege	3828	winupdate.exe
Token: SeProfSingleProcessPrivilege	3828	winupdate.exe
Token: SeIncBasePriorityPrivilege	3828	winupdate.exe
Token: SeCreatePagefilePrivilege	3828	winupdate.exe
Token: SeBackupPrivilege	3828	winupdate.exe
Token: SeRestorePrivilege	3828	winupdate.exe
Token: SeShutdownPrivilege	3828	winupdate.exe
Token: SeDebugPrivilege	3828	winupdate.exe
Token: SeSystemEnvironmentPrivilege	3828	winupdate.exe
Token: SeChangeNotifyPrivilege	3828	winupdate.exe
Token: SeRemoteShutdownPrivilege	3828	winupdate.exe
Token: SeUndockPrivilege	3828	winupdate.exe
Token: SeManageVolumePrivilege	3828	winupdate.exe
Token: SeImpersonatePrivilege	3828	winupdate.exe
Token: SeCreateGlobalPrivilege	3828	winupdate.exe
Token: 33	3828	winupdate.exe
Token: 34	3828	winupdate.exe
Token: 35	3828	winupdate.exe
Token: 36	3828	winupdate.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
4552	739e065498d059c844eefc77fc7b24f9.exe
3684	winupdate.exe
3828	winupdate.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 4552 wrote to memory of 2728	4552	739e065498d059c844eefc77fc7b24f9.exe	88
PID 4552 wrote to memory of 2728	4552	739e065498d059c844eefc77fc7b24f9.exe	88
PID 4552 wrote to memory of 2728	4552	739e065498d059c844eefc77fc7b24f9.exe	88
PID 4552 wrote to memory of 2728	4552	739e065498d059c844eefc77fc7b24f9.exe	88
PID 4552 wrote to memory of 2728	4552	739e065498d059c844eefc77fc7b24f9.exe	88
PID 4552 wrote to memory of 2728	4552	739e065498d059c844eefc77fc7b24f9.exe	88
PID 4552 wrote to memory of 2728	4552	739e065498d059c844eefc77fc7b24f9.exe	88
PID 4552 wrote to memory of 2728	4552	739e065498d059c844eefc77fc7b24f9.exe	88
PID 2728 wrote to memory of 4012	2728	739e065498d059c844eefc77fc7b24f9.exe	89
PID 2728 wrote to memory of 4012	2728	739e065498d059c844eefc77fc7b24f9.exe	89
PID 2728 wrote to memory of 4012	2728	739e065498d059c844eefc77fc7b24f9.exe	89
PID 2728 wrote to memory of 4036	2728	739e065498d059c844eefc77fc7b24f9.exe	91
PID 2728 wrote to memory of 4036	2728	739e065498d059c844eefc77fc7b24f9.exe	91
PID 2728 wrote to memory of 4036	2728	739e065498d059c844eefc77fc7b24f9.exe	91
PID 2728 wrote to memory of 60	2728	739e065498d059c844eefc77fc7b24f9.exe	92
PID 2728 wrote to memory of 60	2728	739e065498d059c844eefc77fc7b24f9.exe	92
PID 2728 wrote to memory of 60	2728	739e065498d059c844eefc77fc7b24f9.exe	92
PID 60 wrote to memory of 1340	60	cmd.exe	95
PID 60 wrote to memory of 1340	60	cmd.exe	95
PID 60 wrote to memory of 1340	60	cmd.exe	95
PID 4036 wrote to memory of 4040	4036	cmd.exe	96
PID 4036 wrote to memory of 4040	4036	cmd.exe	96
PID 4036 wrote to memory of 4040	4036	cmd.exe	96
PID 4012 wrote to memory of 412	4012	cmd.exe	97
PID 4012 wrote to memory of 412	4012	cmd.exe	97
PID 4012 wrote to memory of 412	4012	cmd.exe	97
PID 2728 wrote to memory of 3684	2728	739e065498d059c844eefc77fc7b24f9.exe	99
PID 2728 wrote to memory of 3684	2728	739e065498d059c844eefc77fc7b24f9.exe	99
PID 2728 wrote to memory of 3684	2728	739e065498d059c844eefc77fc7b24f9.exe	99
PID 3684 wrote to memory of 3828	3684	winupdate.exe	100
PID 3684 wrote to memory of 3828	3684	winupdate.exe	100
PID 3684 wrote to memory of 3828	3684	winupdate.exe	100
PID 3684 wrote to memory of 3828	3684	winupdate.exe	100
PID 3684 wrote to memory of 3828	3684	winupdate.exe	100
PID 3684 wrote to memory of 3828	3684	winupdate.exe	100
PID 3684 wrote to memory of 3828	3684	winupdate.exe	100
PID 3684 wrote to memory of 3828	3684	winupdate.exe	100

Views/modifies file attributes 1 TTPs 2 IoCs

Hidden Files and Directories

T1564.001

pid	Process
4040	attrib.exe
412	attrib.exe

C:\Users\Admin\AppData\Local\Temp\739e065498d059c844eefc77fc7b24f9.exe
"C:\Users\Admin\AppData\Local\Temp\739e065498d059c844eefc77fc7b24f9.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4552
- C:\Users\Admin\AppData\Local\Temp\739e065498d059c844eefc77fc7b24f9.exe
  C:\Users\Admin\AppData\Local\Temp\739e065498d059c844eefc77fc7b24f9.exe
  2⤵
  - Modifies WinLogon for persistence
  - Checks computer location settings
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2728
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\739e065498d059c844eefc77fc7b24f9.exe" +s +h
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4012
  - - C:\Windows\SysWOW64\attrib.exe
      attrib "C:\Users\Admin\AppData\Local\Temp\739e065498d059c844eefc77fc7b24f9.exe" +s +h
      4⤵
      Sets file to hidden
      Views/modifies file attributes
      PID:412
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4036
  - - C:\Windows\SysWOW64\attrib.exe
      attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
      4⤵
      Sets file to hidden
      Views/modifies file attributes
      PID:4040
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /k ping 127.0.0.1 -n 5&del "C:\Users\Admin\AppData\Local\Temp\739e065498d059c844eefc77fc7b24f9.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:60
  - - C:\Windows\SysWOW64\PING.EXE
      ping 127.0.0.1 -n 5
      4⤵
      Runs ping.exe
      PID:1340
- - C:\Windupdt\winupdate.exe
    "C:\Windupdt\winupdate.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3684
  - - C:\Windupdt\winupdate.exe
      C:\Windupdt\winupdate.exe
      4⤵
      Modifies firewall policy service
      Modifies security service
      Windows security bypass
      Executes dropped EXE
      Windows security modification
      Adds Run key to start application
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:3828

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

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry