darkcomet | 61ab7b39c2dbfbd774a8f248bb82e01b7bf561cc33f1b9650f24d9c87661545f

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windupdt\\winupdate.exe"	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe

Modifies firewall policy service 3 TTPs 3 IoCs

evasion

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

evasion

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 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	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.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	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

pid	Process
3364	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-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe"	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe

UPX packed file 19 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2320-0-0x0000000000400000-0x00000000004CD000-memory.dmp	upx
behavioral2/files/0x0008000000023ca4-7.dat	upx
behavioral2/memory/3364-13-0x0000000000400000-0x00000000004CD000-memory.dmp	upx
behavioral2/memory/2320-15-0x0000000000400000-0x00000000004CD000-memory.dmp	upx
behavioral2/memory/3364-17-0x0000000000400000-0x00000000004CD000-memory.dmp	upx
behavioral2/memory/3364-18-0x0000000000400000-0x00000000004CD000-memory.dmp	upx
behavioral2/memory/3364-20-0x0000000000400000-0x00000000004CD000-memory.dmp	upx
behavioral2/memory/3364-21-0x0000000000400000-0x00000000004CD000-memory.dmp	upx
behavioral2/memory/3364-22-0x0000000000400000-0x00000000004CD000-memory.dmp	upx
behavioral2/memory/3364-23-0x0000000000400000-0x00000000004CD000-memory.dmp	upx
behavioral2/memory/3364-24-0x0000000000400000-0x00000000004CD000-memory.dmp	upx
behavioral2/memory/3364-25-0x0000000000400000-0x00000000004CD000-memory.dmp	upx
behavioral2/memory/3364-26-0x0000000000400000-0x00000000004CD000-memory.dmp	upx
behavioral2/memory/3364-27-0x0000000000400000-0x00000000004CD000-memory.dmp	upx
behavioral2/memory/3364-28-0x0000000000400000-0x00000000004CD000-memory.dmp	upx
behavioral2/memory/3364-29-0x0000000000400000-0x00000000004CD000-memory.dmp	upx
behavioral2/memory/3364-30-0x0000000000400000-0x00000000004CD000-memory.dmp	upx
behavioral2/memory/3364-31-0x0000000000400000-0x00000000004CD000-memory.dmp	upx
behavioral2/memory/3364-32-0x0000000000400000-0x00000000004CD000-memory.dmp	upx

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	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.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	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	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.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	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3364	winupdate.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Token: SeSecurityPrivilege	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Token: SeTakeOwnershipPrivilege	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Token: SeLoadDriverPrivilege	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Token: SeSystemProfilePrivilege	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Token: SeSystemtimePrivilege	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Token: SeProfSingleProcessPrivilege	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Token: SeIncBasePriorityPrivilege	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Token: SeCreatePagefilePrivilege	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Token: SeBackupPrivilege	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Token: SeRestorePrivilege	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Token: SeShutdownPrivilege	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Token: SeDebugPrivilege	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Token: SeSystemEnvironmentPrivilege	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Token: SeChangeNotifyPrivilege	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Token: SeRemoteShutdownPrivilege	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Token: SeUndockPrivilege	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Token: SeManageVolumePrivilege	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Token: SeImpersonatePrivilege	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Token: SeCreateGlobalPrivilege	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Token: 33	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Token: 34	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Token: 35	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Token: 36	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
Token: SeIncreaseQuotaPrivilege	3364	winupdate.exe
Token: SeSecurityPrivilege	3364	winupdate.exe
Token: SeTakeOwnershipPrivilege	3364	winupdate.exe
Token: SeLoadDriverPrivilege	3364	winupdate.exe
Token: SeSystemProfilePrivilege	3364	winupdate.exe
Token: SeSystemtimePrivilege	3364	winupdate.exe
Token: SeProfSingleProcessPrivilege	3364	winupdate.exe
Token: SeIncBasePriorityPrivilege	3364	winupdate.exe
Token: SeCreatePagefilePrivilege	3364	winupdate.exe
Token: SeBackupPrivilege	3364	winupdate.exe
Token: SeRestorePrivilege	3364	winupdate.exe
Token: SeShutdownPrivilege	3364	winupdate.exe
Token: SeDebugPrivilege	3364	winupdate.exe
Token: SeSystemEnvironmentPrivilege	3364	winupdate.exe
Token: SeChangeNotifyPrivilege	3364	winupdate.exe
Token: SeRemoteShutdownPrivilege	3364	winupdate.exe
Token: SeUndockPrivilege	3364	winupdate.exe
Token: SeManageVolumePrivilege	3364	winupdate.exe
Token: SeImpersonatePrivilege	3364	winupdate.exe
Token: SeCreateGlobalPrivilege	3364	winupdate.exe
Token: 33	3364	winupdate.exe
Token: 34	3364	winupdate.exe
Token: 35	3364	winupdate.exe
Token: 36	3364	winupdate.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2320 wrote to memory of 3364	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe	83
PID 2320 wrote to memory of 3364	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe	83
PID 2320 wrote to memory of 3364	2320	a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe	83

System policy modification 1 TTPs 3 IoCs

evasion

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\a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\a80d9f57d44c84cd334d5ee47e8e4c99_JaffaCakes118.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:2320
- C:\Windupdt\winupdate.exe
  "C:\Windupdt\winupdate.exe"
  2⤵
  - Modifies firewall policy service
  - 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
  - System policy modification
  PID:3364

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