darkcomet | 901f0caa08f883123e4024e7f4c3df3967080d78af0cc012ee5f9efbc0b7737f

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	WHU-DU~1.EXE

Executes dropped EXE 1 IoCs

pid	Process
1376	WHU-DU~1.EXE

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup0 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP000.TMP\\\""	9548d12b1a7d6e3ea25cb1d4cbfcd815_JaffaCakes118.exe

UPX packed file 17 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000d000000023b8c-5.dat	upx
behavioral2/memory/1376-6-0x0000000013140000-0x00000000131FB000-memory.dmp	upx
behavioral2/memory/1376-9-0x0000000013140000-0x00000000131FB000-memory.dmp	upx
behavioral2/memory/1376-10-0x0000000013140000-0x00000000131FB000-memory.dmp	upx
behavioral2/memory/1376-11-0x0000000013140000-0x00000000131FB000-memory.dmp	upx
behavioral2/memory/1376-12-0x0000000013140000-0x00000000131FB000-memory.dmp	upx
behavioral2/memory/1376-13-0x0000000013140000-0x00000000131FB000-memory.dmp	upx
behavioral2/memory/1376-14-0x0000000013140000-0x00000000131FB000-memory.dmp	upx
behavioral2/memory/1376-15-0x0000000013140000-0x00000000131FB000-memory.dmp	upx
behavioral2/memory/1376-16-0x0000000013140000-0x00000000131FB000-memory.dmp	upx
behavioral2/memory/1376-17-0x0000000013140000-0x00000000131FB000-memory.dmp	upx
behavioral2/memory/1376-18-0x0000000013140000-0x00000000131FB000-memory.dmp	upx
behavioral2/memory/1376-19-0x0000000013140000-0x00000000131FB000-memory.dmp	upx
behavioral2/memory/1376-20-0x0000000013140000-0x00000000131FB000-memory.dmp	upx
behavioral2/memory/1376-21-0x0000000013140000-0x00000000131FB000-memory.dmp	upx
behavioral2/memory/1376-22-0x0000000013140000-0x00000000131FB000-memory.dmp	upx
behavioral2/memory/1376-23-0x0000000013140000-0x00000000131FB000-memory.dmp	upx

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	WHU-DU~1.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	notepad.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	9548d12b1a7d6e3ea25cb1d4cbfcd815_JaffaCakes118.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 opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	WHU-DU~1.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	WHU-DU~1.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	WHU-DU~1.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	WHU-DU~1.EXE

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	WHU-DU~1.EXE

Suspicious use of AdjustPrivilegeToken 24 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1376	WHU-DU~1.EXE
Token: SeSecurityPrivilege	1376	WHU-DU~1.EXE
Token: SeTakeOwnershipPrivilege	1376	WHU-DU~1.EXE
Token: SeLoadDriverPrivilege	1376	WHU-DU~1.EXE
Token: SeSystemProfilePrivilege	1376	WHU-DU~1.EXE
Token: SeSystemtimePrivilege	1376	WHU-DU~1.EXE
Token: SeProfSingleProcessPrivilege	1376	WHU-DU~1.EXE
Token: SeIncBasePriorityPrivilege	1376	WHU-DU~1.EXE
Token: SeCreatePagefilePrivilege	1376	WHU-DU~1.EXE
Token: SeBackupPrivilege	1376	WHU-DU~1.EXE
Token: SeRestorePrivilege	1376	WHU-DU~1.EXE
Token: SeShutdownPrivilege	1376	WHU-DU~1.EXE
Token: SeDebugPrivilege	1376	WHU-DU~1.EXE
Token: SeSystemEnvironmentPrivilege	1376	WHU-DU~1.EXE
Token: SeChangeNotifyPrivilege	1376	WHU-DU~1.EXE
Token: SeRemoteShutdownPrivilege	1376	WHU-DU~1.EXE
Token: SeUndockPrivilege	1376	WHU-DU~1.EXE
Token: SeManageVolumePrivilege	1376	WHU-DU~1.EXE
Token: SeImpersonatePrivilege	1376	WHU-DU~1.EXE
Token: SeCreateGlobalPrivilege	1376	WHU-DU~1.EXE
Token: 33	1376	WHU-DU~1.EXE
Token: 34	1376	WHU-DU~1.EXE
Token: 35	1376	WHU-DU~1.EXE
Token: 36	1376	WHU-DU~1.EXE

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2216 wrote to memory of 1376	2216	9548d12b1a7d6e3ea25cb1d4cbfcd815_JaffaCakes118.exe	83
PID 2216 wrote to memory of 1376	2216	9548d12b1a7d6e3ea25cb1d4cbfcd815_JaffaCakes118.exe	83
PID 2216 wrote to memory of 1376	2216	9548d12b1a7d6e3ea25cb1d4cbfcd815_JaffaCakes118.exe	83
PID 1376 wrote to memory of 5012	1376	WHU-DU~1.EXE	84
PID 1376 wrote to memory of 5012	1376	WHU-DU~1.EXE	84
PID 1376 wrote to memory of 5012	1376	WHU-DU~1.EXE	84
PID 1376 wrote to memory of 5012	1376	WHU-DU~1.EXE	84
PID 1376 wrote to memory of 5012	1376	WHU-DU~1.EXE	84
PID 1376 wrote to memory of 5012	1376	WHU-DU~1.EXE	84
PID 1376 wrote to memory of 5012	1376	WHU-DU~1.EXE	84
PID 1376 wrote to memory of 5012	1376	WHU-DU~1.EXE	84
PID 1376 wrote to memory of 5012	1376	WHU-DU~1.EXE	84
PID 1376 wrote to memory of 5012	1376	WHU-DU~1.EXE	84
PID 1376 wrote to memory of 5012	1376	WHU-DU~1.EXE	84
PID 1376 wrote to memory of 5012	1376	WHU-DU~1.EXE	84
PID 1376 wrote to memory of 5012	1376	WHU-DU~1.EXE	84
PID 1376 wrote to memory of 5012	1376	WHU-DU~1.EXE	84
PID 1376 wrote to memory of 5012	1376	WHU-DU~1.EXE	84
PID 1376 wrote to memory of 5012	1376	WHU-DU~1.EXE	84
PID 1376 wrote to memory of 5012	1376	WHU-DU~1.EXE	84
PID 1376 wrote to memory of 5012	1376	WHU-DU~1.EXE	84
PID 1376 wrote to memory of 5012	1376	WHU-DU~1.EXE	84
PID 1376 wrote to memory of 5012	1376	WHU-DU~1.EXE	84
PID 1376 wrote to memory of 5012	1376	WHU-DU~1.EXE	84
PID 1376 wrote to memory of 5012	1376	WHU-DU~1.EXE	84

C:\Users\Admin\AppData\Local\Temp\9548d12b1a7d6e3ea25cb1d4cbfcd815_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\9548d12b1a7d6e3ea25cb1d4cbfcd815_JaffaCakes118.exe"
1⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2216
- C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\WHU-DU~1.EXE
  C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\WHU-DU~1.EXE
  2⤵
  - Checks BIOS information in registry
  - Executes dropped EXE
  - 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:1376
- - C:\Windows\SysWOW64\notepad.exe
    C:\Windows\SysWOW64\notepad.exe
    3⤵
    - System Location Discovery: System Language Discovery
    PID:5012

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

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

3

System Information Discovery

3

System Location Discovery

T1614

System Language Discovery