darkcomet | 391d9cd933d7cbc8cf2a4651f99c77c6310d4eb5c3f1177ceed0d5c536eba968

System Information Discovery

Processes:

Soundcrd.exe

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

System Information Discovery

Processes:

391d9cd933d7cbc8cf2a4651f99c77c6310d4eb5c3f1177ceed0d5c536eba968.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	391d9cd933d7cbc8cf2a4651f99c77c6310d4eb5c3f1177ceed0d5c536eba968.exe

Executes dropped EXE 3 IoCs

Processes:

Soundcrd.exeSoundcrd.exeSoundcrd.exe

pid	Process
3688	Soundcrd.exe
1964	Soundcrd.exe
4972	Soundcrd.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

reg.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Mcrosoftt = "C:\\Users\\Admin\\AppData\\Roaming\\Soundcrd.exe"	reg.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

Soundcrd.exe

description	pid	Process	procid_target
PID 3688 set thread context of 1964	3688	Soundcrd.exe	88
PID 3688 set thread context of 4972	3688	Soundcrd.exe	89

UPX packed file 23 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4396-0-0x0000000000400000-0x00000000007EC000-memory.dmp	upx
behavioral2/files/0x000a000000023c8c-16.dat	upx
behavioral2/memory/4396-30-0x0000000000400000-0x00000000007EC000-memory.dmp	upx
behavioral2/memory/1964-34-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1964-36-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4972-41-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/4972-43-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/1964-46-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3688-48-0x0000000000400000-0x00000000007EC000-memory.dmp	upx
behavioral2/memory/1964-49-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1964-51-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1964-50-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1964-45-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1964-38-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4972-35-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/1964-31-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1964-52-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4972-53-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/1964-58-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1964-62-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1964-66-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1964-70-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1964-74-0x0000000000400000-0x00000000004B5000-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 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

Processes:

391d9cd933d7cbc8cf2a4651f99c77c6310d4eb5c3f1177ceed0d5c536eba968.execmd.exereg.exeSoundcrd.exeSoundcrd.exeSoundcrd.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	391d9cd933d7cbc8cf2a4651f99c77c6310d4eb5c3f1177ceed0d5c536eba968.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Soundcrd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Soundcrd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Soundcrd.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

Processes:

Soundcrd.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	Soundcrd.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	Soundcrd.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	Soundcrd.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	Soundcrd.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

System Information Discovery

Processes:

Soundcrd.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	Soundcrd.exe

Suspicious use of AdjustPrivilegeToken 25 IoCs

Processes:

Soundcrd.exeSoundcrd.exe

description	pid	Process
Token: SeDebugPrivilege	4972	Soundcrd.exe
Token: SeIncreaseQuotaPrivilege	1964	Soundcrd.exe
Token: SeSecurityPrivilege	1964	Soundcrd.exe
Token: SeTakeOwnershipPrivilege	1964	Soundcrd.exe
Token: SeLoadDriverPrivilege	1964	Soundcrd.exe
Token: SeSystemProfilePrivilege	1964	Soundcrd.exe
Token: SeSystemtimePrivilege	1964	Soundcrd.exe
Token: SeProfSingleProcessPrivilege	1964	Soundcrd.exe
Token: SeIncBasePriorityPrivilege	1964	Soundcrd.exe
Token: SeCreatePagefilePrivilege	1964	Soundcrd.exe
Token: SeBackupPrivilege	1964	Soundcrd.exe
Token: SeRestorePrivilege	1964	Soundcrd.exe
Token: SeShutdownPrivilege	1964	Soundcrd.exe
Token: SeDebugPrivilege	1964	Soundcrd.exe
Token: SeSystemEnvironmentPrivilege	1964	Soundcrd.exe
Token: SeChangeNotifyPrivilege	1964	Soundcrd.exe
Token: SeRemoteShutdownPrivilege	1964	Soundcrd.exe
Token: SeUndockPrivilege	1964	Soundcrd.exe
Token: SeManageVolumePrivilege	1964	Soundcrd.exe
Token: SeImpersonatePrivilege	1964	Soundcrd.exe
Token: SeCreateGlobalPrivilege	1964	Soundcrd.exe
Token: 33	1964	Soundcrd.exe
Token: 34	1964	Soundcrd.exe
Token: 35	1964	Soundcrd.exe
Token: 36	1964	Soundcrd.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

391d9cd933d7cbc8cf2a4651f99c77c6310d4eb5c3f1177ceed0d5c536eba968.exeSoundcrd.exeSoundcrd.exe

pid	Process
4396	391d9cd933d7cbc8cf2a4651f99c77c6310d4eb5c3f1177ceed0d5c536eba968.exe
3688	Soundcrd.exe
4972	Soundcrd.exe

Suspicious use of WriteProcessMemory 25 IoCs

Processes:

391d9cd933d7cbc8cf2a4651f99c77c6310d4eb5c3f1177ceed0d5c536eba968.execmd.exeSoundcrd.exe

description	pid	Process	procid_target
PID 4396 wrote to memory of 4532	4396	391d9cd933d7cbc8cf2a4651f99c77c6310d4eb5c3f1177ceed0d5c536eba968.exe	83
PID 4396 wrote to memory of 4532	4396	391d9cd933d7cbc8cf2a4651f99c77c6310d4eb5c3f1177ceed0d5c536eba968.exe	83
PID 4396 wrote to memory of 4532	4396	391d9cd933d7cbc8cf2a4651f99c77c6310d4eb5c3f1177ceed0d5c536eba968.exe	83
PID 4532 wrote to memory of 4856	4532	cmd.exe	86
PID 4532 wrote to memory of 4856	4532	cmd.exe	86
PID 4532 wrote to memory of 4856	4532	cmd.exe	86
PID 4396 wrote to memory of 3688	4396	391d9cd933d7cbc8cf2a4651f99c77c6310d4eb5c3f1177ceed0d5c536eba968.exe	87
PID 4396 wrote to memory of 3688	4396	391d9cd933d7cbc8cf2a4651f99c77c6310d4eb5c3f1177ceed0d5c536eba968.exe	87
PID 4396 wrote to memory of 3688	4396	391d9cd933d7cbc8cf2a4651f99c77c6310d4eb5c3f1177ceed0d5c536eba968.exe	87
PID 3688 wrote to memory of 1964	3688	Soundcrd.exe	88
PID 3688 wrote to memory of 1964	3688	Soundcrd.exe	88
PID 3688 wrote to memory of 1964	3688	Soundcrd.exe	88
PID 3688 wrote to memory of 1964	3688	Soundcrd.exe	88
PID 3688 wrote to memory of 1964	3688	Soundcrd.exe	88
PID 3688 wrote to memory of 1964	3688	Soundcrd.exe	88
PID 3688 wrote to memory of 1964	3688	Soundcrd.exe	88
PID 3688 wrote to memory of 1964	3688	Soundcrd.exe	88
PID 3688 wrote to memory of 4972	3688	Soundcrd.exe	89
PID 3688 wrote to memory of 4972	3688	Soundcrd.exe	89
PID 3688 wrote to memory of 4972	3688	Soundcrd.exe	89
PID 3688 wrote to memory of 4972	3688	Soundcrd.exe	89
PID 3688 wrote to memory of 4972	3688	Soundcrd.exe	89
PID 3688 wrote to memory of 4972	3688	Soundcrd.exe	89
PID 3688 wrote to memory of 4972	3688	Soundcrd.exe	89
PID 3688 wrote to memory of 4972	3688	Soundcrd.exe	89

C:\Users\Admin\AppData\Local\Temp\391d9cd933d7cbc8cf2a4651f99c77c6310d4eb5c3f1177ceed0d5c536eba968.exe
"C:\Users\Admin\AppData\Local\Temp\391d9cd933d7cbc8cf2a4651f99c77c6310d4eb5c3f1177ceed0d5c536eba968.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4396
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\BAxhg.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4532
- - C:\Windows\SysWOW64\reg.exe
    REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "Mcrosoftt" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\Soundcrd.exe" /f
    3⤵
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    PID:4856
- C:\Users\Admin\AppData\Roaming\Soundcrd.exe
  "C:\Users\Admin\AppData\Roaming\Soundcrd.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3688
- - C:\Users\Admin\AppData\Roaming\Soundcrd.exe
    C:\Users\Admin\AppData\Roaming\Soundcrd.exe
    3⤵
    - 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
    PID:1964
- - C:\Users\Admin\AppData\Roaming\Soundcrd.exe
    C:\Users\Admin\AppData\Roaming\Soundcrd.exe
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:4972

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

4

System Information Discovery

5

System Location Discovery

T1614

System Language Discovery