darkcomet | b342f8987e50c0b71382b1ca6b162b77b94a7415e1cfab565f902018d6a992e0

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

Modifies firewall policy service 3 TTPs 3 IoCs

defense_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	explorer.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "1"	explorer.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "1"	explorer.exe

Modifies security service 2 TTPs 1 IoCs

defense_evasion

Modify Registry

Windows Service

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\wscsvc\Start = "4"	explorer.exe

Windows security bypass 2 TTPs 2 IoCs

defense_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"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	explorer.exe

Disables RegEdit via registry modification 1 IoCs

defense_evasion

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	explorer.exe

Disables Task Manager via registry modification
defense_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	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	Server.exe

Executes dropped EXE 2 IoCs

pid	Process
2176	7za.exe
2304	Server.exe

Loads dropped DLL 4 IoCs

pid	Process
2488	cmd.exe
2488	cmd.exe
684	JaffaCakes118_71fe7001a5a0173586e57724323086f9.exe
684	JaffaCakes118_71fe7001a5a0173586e57724323086f9.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-1-5-21-1163522206-1469769407-485553996-1000\Software\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe"	Server.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2304 set thread context of 580	2304	Server.exe	34

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/684-0-0x0000000000400000-0x0000000000484000-memory.dmp	upx
behavioral1/memory/684-44-0x0000000000400000-0x0000000000484000-memory.dmp	upx
behavioral1/memory/684-47-0x0000000000400000-0x0000000000484000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 6 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	explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ping.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_71fe7001a5a0173586e57724323086f9.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	7za.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Server.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2516	ping.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\ProcessorNameString	Server.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	Server.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	explorer.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	Server.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	Server.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	explorer.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	Server.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	explorer.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2516	ping.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
580	explorer.exe

Suspicious use of AdjustPrivilegeToken 46 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2304	Server.exe
Token: SeSecurityPrivilege	2304	Server.exe
Token: SeTakeOwnershipPrivilege	2304	Server.exe
Token: SeLoadDriverPrivilege	2304	Server.exe
Token: SeSystemProfilePrivilege	2304	Server.exe
Token: SeSystemtimePrivilege	2304	Server.exe
Token: SeProfSingleProcessPrivilege	2304	Server.exe
Token: SeIncBasePriorityPrivilege	2304	Server.exe
Token: SeCreatePagefilePrivilege	2304	Server.exe
Token: SeBackupPrivilege	2304	Server.exe
Token: SeRestorePrivilege	2304	Server.exe
Token: SeShutdownPrivilege	2304	Server.exe
Token: SeDebugPrivilege	2304	Server.exe
Token: SeSystemEnvironmentPrivilege	2304	Server.exe
Token: SeChangeNotifyPrivilege	2304	Server.exe
Token: SeRemoteShutdownPrivilege	2304	Server.exe
Token: SeUndockPrivilege	2304	Server.exe
Token: SeManageVolumePrivilege	2304	Server.exe
Token: SeImpersonatePrivilege	2304	Server.exe
Token: SeCreateGlobalPrivilege	2304	Server.exe
Token: 33	2304	Server.exe
Token: 34	2304	Server.exe
Token: 35	2304	Server.exe
Token: SeIncreaseQuotaPrivilege	580	explorer.exe
Token: SeSecurityPrivilege	580	explorer.exe
Token: SeTakeOwnershipPrivilege	580	explorer.exe
Token: SeLoadDriverPrivilege	580	explorer.exe
Token: SeSystemProfilePrivilege	580	explorer.exe
Token: SeSystemtimePrivilege	580	explorer.exe
Token: SeProfSingleProcessPrivilege	580	explorer.exe
Token: SeIncBasePriorityPrivilege	580	explorer.exe
Token: SeCreatePagefilePrivilege	580	explorer.exe
Token: SeBackupPrivilege	580	explorer.exe
Token: SeRestorePrivilege	580	explorer.exe
Token: SeShutdownPrivilege	580	explorer.exe
Token: SeDebugPrivilege	580	explorer.exe
Token: SeSystemEnvironmentPrivilege	580	explorer.exe
Token: SeChangeNotifyPrivilege	580	explorer.exe
Token: SeRemoteShutdownPrivilege	580	explorer.exe
Token: SeUndockPrivilege	580	explorer.exe
Token: SeManageVolumePrivilege	580	explorer.exe
Token: SeImpersonatePrivilege	580	explorer.exe
Token: SeCreateGlobalPrivilege	580	explorer.exe
Token: 33	580	explorer.exe
Token: 34	580	explorer.exe
Token: 35	580	explorer.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
580	explorer.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 684 wrote to memory of 2488	684	JaffaCakes118_71fe7001a5a0173586e57724323086f9.exe	30
PID 684 wrote to memory of 2488	684	JaffaCakes118_71fe7001a5a0173586e57724323086f9.exe	30
PID 684 wrote to memory of 2488	684	JaffaCakes118_71fe7001a5a0173586e57724323086f9.exe	30
PID 684 wrote to memory of 2488	684	JaffaCakes118_71fe7001a5a0173586e57724323086f9.exe	30
PID 2488 wrote to memory of 2176	2488	cmd.exe	32
PID 2488 wrote to memory of 2176	2488	cmd.exe	32
PID 2488 wrote to memory of 2176	2488	cmd.exe	32
PID 2488 wrote to memory of 2176	2488	cmd.exe	32
PID 684 wrote to memory of 2304	684	JaffaCakes118_71fe7001a5a0173586e57724323086f9.exe	33
PID 684 wrote to memory of 2304	684	JaffaCakes118_71fe7001a5a0173586e57724323086f9.exe	33
PID 684 wrote to memory of 2304	684	JaffaCakes118_71fe7001a5a0173586e57724323086f9.exe	33
PID 684 wrote to memory of 2304	684	JaffaCakes118_71fe7001a5a0173586e57724323086f9.exe	33
PID 2304 wrote to memory of 580	2304	Server.exe	34
PID 2304 wrote to memory of 580	2304	Server.exe	34
PID 2304 wrote to memory of 580	2304	Server.exe	34
PID 2304 wrote to memory of 580	2304	Server.exe	34
PID 2304 wrote to memory of 580	2304	Server.exe	34
PID 2304 wrote to memory of 580	2304	Server.exe	34
PID 2304 wrote to memory of 2516	2304	Server.exe	35
PID 2304 wrote to memory of 2516	2304	Server.exe	35
PID 2304 wrote to memory of 2516	2304	Server.exe	35
PID 2304 wrote to memory of 2516	2304	Server.exe	35

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_71fe7001a5a0173586e57724323086f9.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_71fe7001a5a0173586e57724323086f9.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:684
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\7za.exe" "x" "-y" "C:\Users\Admin\AppData\Roaming\Server.7z" "-pHVLnt5Dy""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2488
- - C:\Users\Admin\AppData\Roaming\7za.exe
    "C:\Users\Admin\AppData\Roaming\7za.exe" "x" "-y" "C:\Users\Admin\AppData\Roaming\Server.7z" "-pHVLnt5Dy"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2176
- C:\Users\Admin\AppData\Roaming\Server.exe
  C:\Users\Admin\AppData\Roaming\Server.exe
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - 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:2304
- - C:\Windows\SysWOW64\explorer.exe
    "C:\Windows\SysWOW64\explorer.exe"
    3⤵
    - Modifies firewall policy service
    - Modifies security service
    - Windows security bypass
    - Disables RegEdit via registry modification
    - Checks BIOS information in registry
    - 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:580
- - C:\Windows\SysWOW64\ping.exe
    ping 127.0.0.1 -n 5 > NUL del "C:\Users\Admin\AppData\Roaming\Server.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2516

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

Remote System Discovery

T1018

System Information Discovery