darkcomet | 456daeb1ed3b635a9297fbe349f245adda4f1d62e8ba08a84d161f9ac097fabd

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	opipip.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	1e479f954d2399585aec7aeb0783bbc1_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	opipip.exe

Executes dropped EXE 4 IoCs

pid	Process
3136	opipip.exe
2656	opipip.exe
2496	keygen.exe
5080	winupdate_microsoft.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2656-15-0x0000000000400000-0x00000000004C5000-memory.dmp	upx
behavioral2/memory/2656-23-0x0000000000400000-0x00000000004C5000-memory.dmp	upx
behavioral2/memory/2656-22-0x0000000000400000-0x00000000004C5000-memory.dmp	upx
behavioral2/memory/2656-46-0x0000000000400000-0x00000000004C5000-memory.dmp	upx
behavioral2/memory/2656-24-0x0000000000400000-0x00000000004C5000-memory.dmp	upx
behavioral2/memory/2656-19-0x0000000000400000-0x00000000004C5000-memory.dmp	upx
behavioral2/memory/2656-17-0x0000000000400000-0x00000000004C5000-memory.dmp	upx

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\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Windupdt_microsoft\\winupdate_microsoft.exe"	opipip.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3136 set thread context of 2656	3136	opipip.exe	82

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2496	keygen.exe

Suspicious use of AdjustPrivilegeToken 26 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2656	opipip.exe
Token: SeSecurityPrivilege	2656	opipip.exe
Token: SeTakeOwnershipPrivilege	2656	opipip.exe
Token: SeLoadDriverPrivilege	2656	opipip.exe
Token: SeSystemProfilePrivilege	2656	opipip.exe
Token: SeSystemtimePrivilege	2656	opipip.exe
Token: SeProfSingleProcessPrivilege	2656	opipip.exe
Token: SeIncBasePriorityPrivilege	2656	opipip.exe
Token: SeCreatePagefilePrivilege	2656	opipip.exe
Token: SeBackupPrivilege	2656	opipip.exe
Token: SeRestorePrivilege	2656	opipip.exe
Token: SeShutdownPrivilege	2656	opipip.exe
Token: SeDebugPrivilege	2656	opipip.exe
Token: SeSystemEnvironmentPrivilege	2656	opipip.exe
Token: SeChangeNotifyPrivilege	2656	opipip.exe
Token: SeRemoteShutdownPrivilege	2656	opipip.exe
Token: SeUndockPrivilege	2656	opipip.exe
Token: SeManageVolumePrivilege	2656	opipip.exe
Token: SeImpersonatePrivilege	2656	opipip.exe
Token: SeCreateGlobalPrivilege	2656	opipip.exe
Token: 33	2656	opipip.exe
Token: 34	2656	opipip.exe
Token: 35	2656	opipip.exe
Token: 36	2656	opipip.exe
Token: 33	3132	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	3132	AUDIODG.EXE

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2788 wrote to memory of 3136	2788	1e479f954d2399585aec7aeb0783bbc1_JaffaCakes118.exe	81
PID 2788 wrote to memory of 3136	2788	1e479f954d2399585aec7aeb0783bbc1_JaffaCakes118.exe	81
PID 2788 wrote to memory of 3136	2788	1e479f954d2399585aec7aeb0783bbc1_JaffaCakes118.exe	81
PID 3136 wrote to memory of 2656	3136	opipip.exe	82
PID 3136 wrote to memory of 2656	3136	opipip.exe	82
PID 3136 wrote to memory of 2656	3136	opipip.exe	82
PID 3136 wrote to memory of 2656	3136	opipip.exe	82
PID 3136 wrote to memory of 2656	3136	opipip.exe	82
PID 3136 wrote to memory of 2656	3136	opipip.exe	82
PID 3136 wrote to memory of 2656	3136	opipip.exe	82
PID 3136 wrote to memory of 2656	3136	opipip.exe	82
PID 2788 wrote to memory of 2496	2788	1e479f954d2399585aec7aeb0783bbc1_JaffaCakes118.exe	83
PID 2788 wrote to memory of 2496	2788	1e479f954d2399585aec7aeb0783bbc1_JaffaCakes118.exe	83
PID 2788 wrote to memory of 2496	2788	1e479f954d2399585aec7aeb0783bbc1_JaffaCakes118.exe	83
PID 2656 wrote to memory of 5080	2656	opipip.exe	84
PID 2656 wrote to memory of 5080	2656	opipip.exe	84
PID 2656 wrote to memory of 5080	2656	opipip.exe	84
PID 5080 wrote to memory of 1964	5080	winupdate_microsoft.exe	85
PID 5080 wrote to memory of 1964	5080	winupdate_microsoft.exe	85
PID 5080 wrote to memory of 1964	5080	winupdate_microsoft.exe	85

C:\Users\Admin\AppData\Local\Temp\1e479f954d2399585aec7aeb0783bbc1_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\1e479f954d2399585aec7aeb0783bbc1_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2788
- C:\Users\Admin\AppData\Local\Temp\opipip.exe
  "C:\Users\Admin\AppData\Local\Temp\opipip.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:3136
- - C:\Users\Admin\AppData\Local\Temp\opipip.exe
    "C:\Users\Admin\AppData\Local\Temp\opipip.exe"
    3⤵
    - Modifies WinLogon for persistence
    - Checks BIOS information in registry
    - Checks computer location settings
    - Executes dropped EXE
    - Adds Run key to start application
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2656
  - - C:\Users\Admin\AppData\Local\Temp\Windupdt_microsoft\winupdate_microsoft.exe
      "C:\Users\Admin\AppData\Local\Temp\Windupdt_microsoft\winupdate_microsoft.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of WriteProcessMemory
      PID:5080
    - - C:\Users\Admin\AppData\Local\Temp\Windupdt_microsoft\winupdate_microsoft.exe
        
        "C:\Users\Admin\AppData\Local\Temp\Windupdt_microsoft\winupdate_microsoft.exe"
        5⤵
        
        PID:1964
- C:\Users\Admin\AppData\Local\Temp\keygen.exe
  "C:\Users\Admin\AppData\Local\Temp\keygen.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: GetForegroundWindowSpam
  PID:2496

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x508 0x300
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3132

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

4

System Information Discovery

5