darkcomet | 65bc3003f3f0a776f2bdcd73bff6cd07bd669dc58b73c83ef2bd10ea6520c3f1

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windupdt\\winupdate.exe"	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe

Modifies firewall policy service 3 TTPs 3 IoCs

Modify Registry

Windows Service

Disable or Modify System Firewall

T1562.004

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 = "1"	winupdate.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "1"	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-1-5-21-2878641211-696417878-3864914810-1000\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	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe

Executes dropped EXE 1 IoCs

pid	Process
4036	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 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe"	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.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 2 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	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.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\VendorIdentifier	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.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	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.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	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	winupdate.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4036	winupdate.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Token: SeSecurityPrivilege	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Token: SeTakeOwnershipPrivilege	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Token: SeLoadDriverPrivilege	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Token: SeSystemProfilePrivilege	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Token: SeSystemtimePrivilege	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Token: SeProfSingleProcessPrivilege	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Token: SeIncBasePriorityPrivilege	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Token: SeCreatePagefilePrivilege	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Token: SeBackupPrivilege	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Token: SeRestorePrivilege	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Token: SeShutdownPrivilege	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Token: SeDebugPrivilege	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Token: SeSystemEnvironmentPrivilege	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Token: SeChangeNotifyPrivilege	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Token: SeRemoteShutdownPrivilege	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Token: SeUndockPrivilege	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Token: SeManageVolumePrivilege	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Token: SeImpersonatePrivilege	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Token: SeCreateGlobalPrivilege	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Token: 33	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Token: 34	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Token: 35	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Token: 36	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
Token: SeIncreaseQuotaPrivilege	4036	winupdate.exe
Token: SeSecurityPrivilege	4036	winupdate.exe
Token: SeTakeOwnershipPrivilege	4036	winupdate.exe
Token: SeLoadDriverPrivilege	4036	winupdate.exe
Token: SeSystemProfilePrivilege	4036	winupdate.exe
Token: SeSystemtimePrivilege	4036	winupdate.exe
Token: SeProfSingleProcessPrivilege	4036	winupdate.exe
Token: SeIncBasePriorityPrivilege	4036	winupdate.exe
Token: SeCreatePagefilePrivilege	4036	winupdate.exe
Token: SeBackupPrivilege	4036	winupdate.exe
Token: SeRestorePrivilege	4036	winupdate.exe
Token: SeShutdownPrivilege	4036	winupdate.exe
Token: SeDebugPrivilege	4036	winupdate.exe
Token: SeSystemEnvironmentPrivilege	4036	winupdate.exe
Token: SeChangeNotifyPrivilege	4036	winupdate.exe
Token: SeRemoteShutdownPrivilege	4036	winupdate.exe
Token: SeUndockPrivilege	4036	winupdate.exe
Token: SeManageVolumePrivilege	4036	winupdate.exe
Token: SeImpersonatePrivilege	4036	winupdate.exe
Token: SeCreateGlobalPrivilege	4036	winupdate.exe
Token: 33	4036	winupdate.exe
Token: 34	4036	winupdate.exe
Token: 35	4036	winupdate.exe
Token: 36	4036	winupdate.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 5000 wrote to memory of 4036	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe	85
PID 5000 wrote to memory of 4036	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe	85
PID 5000 wrote to memory of 4036	5000	JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe	85

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\JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6505821479e7f5d59cfae03777cd35c1.exe"
1⤵
- 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
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5000
- C:\Windupdt\winupdate.exe
  "C:\Windupdt\winupdate.exe"
  2⤵
  - 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
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - System policy modification
  PID:4036

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 System Firewall

T1562.004

Disable or Modify Tools

T1562.001

Modify Registry

Credential Access

Discovery

Query Registry

System Information Discovery