darkcomet | e89b470296f6273a598e356c6989a298a3248132a2db8f56e574e5285b70813a

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windupdt\\winupdate.exe"	svr crypt w.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 2 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
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-1-5-21-399997616-3400990511-967324271-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "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	svr crypt w.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	winupdate.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation	b20a5a7a3c2a46d2a4139a8c6b842b9f.exe
Key value queried	\REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation	svr crypt w.exe

Executes dropped EXE 5 IoCs

pid	Process
4892	Keygen Adobe Photoshop CS5 Extended.exe
4168	svr crypt w.exe
4436	svr crypt w.exe
2392	winupdate.exe
524	winupdate.exe

Windows security modification 2 TTPs 2 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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "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-1-5-21-399997616-3400990511-967324271-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe"	svr crypt w.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe"	notepad.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4168 set thread context of 4436	4168	svr crypt w.exe	93
PID 2392 set thread context of 524	2392	winupdate.exe	100

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

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	svr crypt w.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	svr crypt w.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	svr crypt w.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	svr crypt w.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	svr crypt w.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\	svr crypt w.exe

Suspicious use of AdjustPrivilegeToken 50 IoCs

description	pid	Process
Token: 33	3756	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	3756	AUDIODG.EXE
Token: SeIncreaseQuotaPrivilege	4436	svr crypt w.exe
Token: SeSecurityPrivilege	4436	svr crypt w.exe
Token: SeTakeOwnershipPrivilege	4436	svr crypt w.exe
Token: SeLoadDriverPrivilege	4436	svr crypt w.exe
Token: SeSystemProfilePrivilege	4436	svr crypt w.exe
Token: SeSystemtimePrivilege	4436	svr crypt w.exe
Token: SeProfSingleProcessPrivilege	4436	svr crypt w.exe
Token: SeIncBasePriorityPrivilege	4436	svr crypt w.exe
Token: SeCreatePagefilePrivilege	4436	svr crypt w.exe
Token: SeBackupPrivilege	4436	svr crypt w.exe
Token: SeRestorePrivilege	4436	svr crypt w.exe
Token: SeShutdownPrivilege	4436	svr crypt w.exe
Token: SeDebugPrivilege	4436	svr crypt w.exe
Token: SeSystemEnvironmentPrivilege	4436	svr crypt w.exe
Token: SeChangeNotifyPrivilege	4436	svr crypt w.exe
Token: SeRemoteShutdownPrivilege	4436	svr crypt w.exe
Token: SeUndockPrivilege	4436	svr crypt w.exe
Token: SeManageVolumePrivilege	4436	svr crypt w.exe
Token: SeImpersonatePrivilege	4436	svr crypt w.exe
Token: SeCreateGlobalPrivilege	4436	svr crypt w.exe
Token: 33	4436	svr crypt w.exe
Token: 34	4436	svr crypt w.exe
Token: 35	4436	svr crypt w.exe
Token: 36	4436	svr crypt w.exe
Token: SeIncreaseQuotaPrivilege	524	winupdate.exe
Token: SeSecurityPrivilege	524	winupdate.exe
Token: SeTakeOwnershipPrivilege	524	winupdate.exe
Token: SeLoadDriverPrivilege	524	winupdate.exe
Token: SeSystemProfilePrivilege	524	winupdate.exe
Token: SeSystemtimePrivilege	524	winupdate.exe
Token: SeProfSingleProcessPrivilege	524	winupdate.exe
Token: SeIncBasePriorityPrivilege	524	winupdate.exe
Token: SeCreatePagefilePrivilege	524	winupdate.exe
Token: SeBackupPrivilege	524	winupdate.exe
Token: SeRestorePrivilege	524	winupdate.exe
Token: SeShutdownPrivilege	524	winupdate.exe
Token: SeDebugPrivilege	524	winupdate.exe
Token: SeSystemEnvironmentPrivilege	524	winupdate.exe
Token: SeChangeNotifyPrivilege	524	winupdate.exe
Token: SeRemoteShutdownPrivilege	524	winupdate.exe
Token: SeUndockPrivilege	524	winupdate.exe
Token: SeManageVolumePrivilege	524	winupdate.exe
Token: SeImpersonatePrivilege	524	winupdate.exe
Token: SeCreateGlobalPrivilege	524	winupdate.exe
Token: 33	524	winupdate.exe
Token: 34	524	winupdate.exe
Token: 35	524	winupdate.exe
Token: 36	524	winupdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
524	winupdate.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 3200 wrote to memory of 4892	3200	b20a5a7a3c2a46d2a4139a8c6b842b9f.exe	90
PID 3200 wrote to memory of 4892	3200	b20a5a7a3c2a46d2a4139a8c6b842b9f.exe	90
PID 3200 wrote to memory of 4892	3200	b20a5a7a3c2a46d2a4139a8c6b842b9f.exe	90
PID 3200 wrote to memory of 4168	3200	b20a5a7a3c2a46d2a4139a8c6b842b9f.exe	91
PID 3200 wrote to memory of 4168	3200	b20a5a7a3c2a46d2a4139a8c6b842b9f.exe	91
PID 3200 wrote to memory of 4168	3200	b20a5a7a3c2a46d2a4139a8c6b842b9f.exe	91
PID 4168 wrote to memory of 4436	4168	svr crypt w.exe	93
PID 4168 wrote to memory of 4436	4168	svr crypt w.exe	93
PID 4168 wrote to memory of 4436	4168	svr crypt w.exe	93
PID 4168 wrote to memory of 4436	4168	svr crypt w.exe	93
PID 4168 wrote to memory of 4436	4168	svr crypt w.exe	93
PID 4168 wrote to memory of 4436	4168	svr crypt w.exe	93
PID 4168 wrote to memory of 4436	4168	svr crypt w.exe	93
PID 4168 wrote to memory of 4436	4168	svr crypt w.exe	93
PID 4168 wrote to memory of 4436	4168	svr crypt w.exe	93
PID 4168 wrote to memory of 4436	4168	svr crypt w.exe	93
PID 4168 wrote to memory of 4436	4168	svr crypt w.exe	93
PID 4168 wrote to memory of 4436	4168	svr crypt w.exe	93
PID 4168 wrote to memory of 4436	4168	svr crypt w.exe	93
PID 4168 wrote to memory of 4436	4168	svr crypt w.exe	93
PID 4436 wrote to memory of 1220	4436	svr crypt w.exe	95
PID 4436 wrote to memory of 1220	4436	svr crypt w.exe	95
PID 4436 wrote to memory of 1220	4436	svr crypt w.exe	95
PID 4436 wrote to memory of 1220	4436	svr crypt w.exe	95
PID 4436 wrote to memory of 1220	4436	svr crypt w.exe	95
PID 4436 wrote to memory of 1220	4436	svr crypt w.exe	95
PID 4436 wrote to memory of 1220	4436	svr crypt w.exe	95
PID 4436 wrote to memory of 1220	4436	svr crypt w.exe	95
PID 4436 wrote to memory of 1220	4436	svr crypt w.exe	95
PID 4436 wrote to memory of 1220	4436	svr crypt w.exe	95
PID 4436 wrote to memory of 1220	4436	svr crypt w.exe	95
PID 4436 wrote to memory of 1220	4436	svr crypt w.exe	95
PID 4436 wrote to memory of 1220	4436	svr crypt w.exe	95
PID 4436 wrote to memory of 1220	4436	svr crypt w.exe	95
PID 4436 wrote to memory of 1220	4436	svr crypt w.exe	95
PID 4436 wrote to memory of 1220	4436	svr crypt w.exe	95
PID 4436 wrote to memory of 1220	4436	svr crypt w.exe	95
PID 4436 wrote to memory of 1220	4436	svr crypt w.exe	95
PID 4436 wrote to memory of 1220	4436	svr crypt w.exe	95
PID 4436 wrote to memory of 1220	4436	svr crypt w.exe	95
PID 4436 wrote to memory of 1220	4436	svr crypt w.exe	95
PID 4436 wrote to memory of 1220	4436	svr crypt w.exe	95
PID 4436 wrote to memory of 1220	4436	svr crypt w.exe	95
PID 4436 wrote to memory of 4216	4436	svr crypt w.exe	96
PID 4436 wrote to memory of 4216	4436	svr crypt w.exe	96
PID 4436 wrote to memory of 4216	4436	svr crypt w.exe	96
PID 4436 wrote to memory of 2392	4436	svr crypt w.exe	99
PID 4436 wrote to memory of 2392	4436	svr crypt w.exe	99
PID 4436 wrote to memory of 2392	4436	svr crypt w.exe	99
PID 2392 wrote to memory of 524	2392	winupdate.exe	100
PID 2392 wrote to memory of 524	2392	winupdate.exe	100
PID 2392 wrote to memory of 524	2392	winupdate.exe	100
PID 2392 wrote to memory of 524	2392	winupdate.exe	100
PID 2392 wrote to memory of 524	2392	winupdate.exe	100
PID 2392 wrote to memory of 524	2392	winupdate.exe	100
PID 2392 wrote to memory of 524	2392	winupdate.exe	100
PID 2392 wrote to memory of 524	2392	winupdate.exe	100
PID 2392 wrote to memory of 524	2392	winupdate.exe	100
PID 2392 wrote to memory of 524	2392	winupdate.exe	100
PID 2392 wrote to memory of 524	2392	winupdate.exe	100
PID 2392 wrote to memory of 524	2392	winupdate.exe	100
PID 2392 wrote to memory of 524	2392	winupdate.exe	100
PID 2392 wrote to memory of 524	2392	winupdate.exe	100
PID 524 wrote to memory of 3724	524	winupdate.exe	101

System policy modification 1 TTPs 3 IoCs

Modify Registry

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

C:\Users\Admin\AppData\Local\Temp\b20a5a7a3c2a46d2a4139a8c6b842b9f.exe
"C:\Users\Admin\AppData\Local\Temp\b20a5a7a3c2a46d2a4139a8c6b842b9f.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3200
- C:\Users\Admin\AppData\Local\Temp\Keygen Adobe Photoshop CS5 Extended.exe
  "C:\Users\Admin\AppData\Local\Temp\Keygen Adobe Photoshop CS5 Extended.exe"
  2⤵
  - Executes dropped EXE
  PID:4892
- C:\Users\Admin\AppData\Local\Temp\svr crypt w.exe
  "C:\Users\Admin\AppData\Local\Temp\svr crypt w.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:4168
- - C:\Users\Admin\AppData\Local\Temp\svr crypt w.exe
    "C:\Users\Admin\AppData\Local\Temp\svr crypt w.exe"
    3⤵
    - Modifies WinLogon for persistence
    - Checks BIOS information in registry
    - Checks computer location settings
    - Executes dropped EXE
    - 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:4436
  - - C:\Windows\SysWOW64\notepad.exe
      notepad
      4⤵
      Adds Run key to start application
      PID:1220
  - - C:\Windows\SysWOW64\explorer.exe
      "C:\Windows\SysWOW64\explorer.exe"
      4⤵
      PID:4216
  - - C:\Windupdt\winupdate.exe
      "C:\Windupdt\winupdate.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious use of WriteProcessMemory
      PID:2392
    - - C:\Windupdt\winupdate.exe
        
        "C:\Windupdt\winupdate.exe"
        5⤵
        Modifies firewall policy service
        Modifies security service
        Windows security bypass
        Disables RegEdit via registry modification
        Checks BIOS information in registry
        Executes dropped EXE
        Windows security modification
        Checks processor information in registry
        Enumerates system info in registry
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        System policy modification
        
        PID:524
      - C:\Windows\SysWOW64\explorer.exe
        
        "C:\Windows\SysWOW64\explorer.exe"
        6⤵
        
        PID:3724
      - C:\Windows\SysWOW64\notepad.exe
        
        C:\Windows\SysWOW64\notepad.exe
        6⤵
        
        PID:5064

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x50c 0x4fc
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3756

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 Tools

T1562.001

Modify Registry

Credential Access

Discovery

Query Registry

System Information Discovery