darkcomet | ca6d6e3220f13714a706d40336c206d5366ee5e040353814b63048077913aef6

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	Xserver.ExE.scr

Executes dropped EXE 1 IoCs

pid	Process
2664	Xserver.ExE.scr

Loads dropped DLL 2 IoCs

pid	Process
2812	3f08e90cbcd4bbed6d4f288ee78ea10b_JaffaCakes118.exe
2812	3f08e90cbcd4bbed6d4f288ee78ea10b_JaffaCakes118.exe

Windows security modification 2 TTPs 1 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	Xserver.ExE.scr

UPX packed file 18 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2812-13-0x0000000003410000-0x00000000034E8000-memory.dmp	upx
behavioral1/files/0x0008000000015baa-12.dat	upx
behavioral1/memory/2664-14-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
behavioral1/memory/2664-17-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
behavioral1/memory/2664-18-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
behavioral1/memory/2664-19-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
behavioral1/memory/2664-20-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
behavioral1/memory/2664-21-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
behavioral1/memory/2664-22-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
behavioral1/memory/2664-23-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
behavioral1/memory/2664-24-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
behavioral1/memory/2664-25-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
behavioral1/memory/2664-26-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
behavioral1/memory/2664-27-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
behavioral1/memory/2664-28-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
behavioral1/memory/2664-29-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
behavioral1/memory/2664-30-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
behavioral1/memory/2664-31-0x0000000000400000-0x00000000004D8000-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 3 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	Xserver.ExE.scr
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3f08e90cbcd4bbed6d4f288ee78ea10b_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	DllHost.exe

Checks processor information in registry 2 TTPs 4 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	Xserver.ExE.scr
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	Xserver.ExE.scr
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	Xserver.ExE.scr
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	Xserver.ExE.scr

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	Xserver.ExE.scr

Suspicious use of AdjustPrivilegeToken 23 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2664	Xserver.ExE.scr
Token: SeSecurityPrivilege	2664	Xserver.ExE.scr
Token: SeTakeOwnershipPrivilege	2664	Xserver.ExE.scr
Token: SeLoadDriverPrivilege	2664	Xserver.ExE.scr
Token: SeSystemProfilePrivilege	2664	Xserver.ExE.scr
Token: SeSystemtimePrivilege	2664	Xserver.ExE.scr
Token: SeProfSingleProcessPrivilege	2664	Xserver.ExE.scr
Token: SeIncBasePriorityPrivilege	2664	Xserver.ExE.scr
Token: SeCreatePagefilePrivilege	2664	Xserver.ExE.scr
Token: SeBackupPrivilege	2664	Xserver.ExE.scr
Token: SeRestorePrivilege	2664	Xserver.ExE.scr
Token: SeShutdownPrivilege	2664	Xserver.ExE.scr
Token: SeDebugPrivilege	2664	Xserver.ExE.scr
Token: SeSystemEnvironmentPrivilege	2664	Xserver.ExE.scr
Token: SeChangeNotifyPrivilege	2664	Xserver.ExE.scr
Token: SeRemoteShutdownPrivilege	2664	Xserver.ExE.scr
Token: SeUndockPrivilege	2664	Xserver.ExE.scr
Token: SeManageVolumePrivilege	2664	Xserver.ExE.scr
Token: SeImpersonatePrivilege	2664	Xserver.ExE.scr
Token: SeCreateGlobalPrivilege	2664	Xserver.ExE.scr
Token: 33	2664	Xserver.ExE.scr
Token: 34	2664	Xserver.ExE.scr
Token: 35	2664	Xserver.ExE.scr

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2848	DllHost.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2664	Xserver.ExE.scr
2848	DllHost.exe
2848	DllHost.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2812 wrote to memory of 2664	2812	3f08e90cbcd4bbed6d4f288ee78ea10b_JaffaCakes118.exe	31
PID 2812 wrote to memory of 2664	2812	3f08e90cbcd4bbed6d4f288ee78ea10b_JaffaCakes118.exe	31
PID 2812 wrote to memory of 2664	2812	3f08e90cbcd4bbed6d4f288ee78ea10b_JaffaCakes118.exe	31
PID 2812 wrote to memory of 2664	2812	3f08e90cbcd4bbed6d4f288ee78ea10b_JaffaCakes118.exe	31

C:\Users\Admin\AppData\Local\Temp\3f08e90cbcd4bbed6d4f288ee78ea10b_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\3f08e90cbcd4bbed6d4f288ee78ea10b_JaffaCakes118.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2812
- C:\Users\Admin\AppData\Local\Temp\Xserver.ExE.scr
  "C:\Users\Admin\AppData\Local\Temp\Xserver.ExE.scr"
  2⤵
  - Modifies firewall policy 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 use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:2664

C:\Windows\SysWOW64\DllHost.exe
C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
PID:2848

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

3

T1562

Disable or Modify System Firewall

T1562.004

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

Query Registry

3

System Information Discovery

4

System Location Discovery

T1614

System Language Discovery