darkcomet | fc6f9d52a9a67fa848a16fbb3ad29c5f1ef81f395ca25a62ffb717950c626167

System Information Discovery

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	df7b910bbc8fdb3e6f99037236ac9c84b42c42639ccf9c63939a79b6457b6185N.exe

Executes dropped EXE 3 IoCs

pid	Process
3704	Soundcrd.exe
3452	Soundcrd.exe
2372	Soundcrd.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\USER\S-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Mcrosoftt = "C:\\Users\\Admin\\AppData\\Roaming\\Soundcrd.exe"	reg.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3704 set thread context of 3452	3704	Soundcrd.exe	91
PID 3704 set thread context of 2372	3704	Soundcrd.exe	92

UPX packed file 18 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3452-32-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3452-36-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3452-35-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2372-37-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/2372-40-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/2372-42-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/3452-44-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3452-50-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3452-49-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3452-48-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3452-47-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3452-52-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2372-53-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/3452-58-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3452-62-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3452-66-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3452-70-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3452-74-0x0000000000400000-0x00000000004B5000-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

description	ioc	Process
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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	df7b910bbc8fdb3e6f99037236ac9c84b42c42639ccf9c63939a79b6457b6185N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.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	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

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

Suspicious use of AdjustPrivilegeToken 25 IoCs

description	pid	Process
Token: SeDebugPrivilege	2372	Soundcrd.exe
Token: SeIncreaseQuotaPrivilege	3452	Soundcrd.exe
Token: SeSecurityPrivilege	3452	Soundcrd.exe
Token: SeTakeOwnershipPrivilege	3452	Soundcrd.exe
Token: SeLoadDriverPrivilege	3452	Soundcrd.exe
Token: SeSystemProfilePrivilege	3452	Soundcrd.exe
Token: SeSystemtimePrivilege	3452	Soundcrd.exe
Token: SeProfSingleProcessPrivilege	3452	Soundcrd.exe
Token: SeIncBasePriorityPrivilege	3452	Soundcrd.exe
Token: SeCreatePagefilePrivilege	3452	Soundcrd.exe
Token: SeBackupPrivilege	3452	Soundcrd.exe
Token: SeRestorePrivilege	3452	Soundcrd.exe
Token: SeShutdownPrivilege	3452	Soundcrd.exe
Token: SeDebugPrivilege	3452	Soundcrd.exe
Token: SeSystemEnvironmentPrivilege	3452	Soundcrd.exe
Token: SeChangeNotifyPrivilege	3452	Soundcrd.exe
Token: SeRemoteShutdownPrivilege	3452	Soundcrd.exe
Token: SeUndockPrivilege	3452	Soundcrd.exe
Token: SeManageVolumePrivilege	3452	Soundcrd.exe
Token: SeImpersonatePrivilege	3452	Soundcrd.exe
Token: SeCreateGlobalPrivilege	3452	Soundcrd.exe
Token: 33	3452	Soundcrd.exe
Token: 34	3452	Soundcrd.exe
Token: 35	3452	Soundcrd.exe
Token: 36	3452	Soundcrd.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
4212	df7b910bbc8fdb3e6f99037236ac9c84b42c42639ccf9c63939a79b6457b6185N.exe
3704	Soundcrd.exe
2372	Soundcrd.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 4212 wrote to memory of 2652	4212	df7b910bbc8fdb3e6f99037236ac9c84b42c42639ccf9c63939a79b6457b6185N.exe	86
PID 4212 wrote to memory of 2652	4212	df7b910bbc8fdb3e6f99037236ac9c84b42c42639ccf9c63939a79b6457b6185N.exe	86
PID 4212 wrote to memory of 2652	4212	df7b910bbc8fdb3e6f99037236ac9c84b42c42639ccf9c63939a79b6457b6185N.exe	86
PID 2652 wrote to memory of 4180	2652	cmd.exe	89
PID 2652 wrote to memory of 4180	2652	cmd.exe	89
PID 2652 wrote to memory of 4180	2652	cmd.exe	89
PID 4212 wrote to memory of 3704	4212	df7b910bbc8fdb3e6f99037236ac9c84b42c42639ccf9c63939a79b6457b6185N.exe	90
PID 4212 wrote to memory of 3704	4212	df7b910bbc8fdb3e6f99037236ac9c84b42c42639ccf9c63939a79b6457b6185N.exe	90
PID 4212 wrote to memory of 3704	4212	df7b910bbc8fdb3e6f99037236ac9c84b42c42639ccf9c63939a79b6457b6185N.exe	90
PID 3704 wrote to memory of 3452	3704	Soundcrd.exe	91
PID 3704 wrote to memory of 3452	3704	Soundcrd.exe	91
PID 3704 wrote to memory of 3452	3704	Soundcrd.exe	91
PID 3704 wrote to memory of 3452	3704	Soundcrd.exe	91
PID 3704 wrote to memory of 3452	3704	Soundcrd.exe	91
PID 3704 wrote to memory of 3452	3704	Soundcrd.exe	91
PID 3704 wrote to memory of 3452	3704	Soundcrd.exe	91
PID 3704 wrote to memory of 3452	3704	Soundcrd.exe	91
PID 3704 wrote to memory of 2372	3704	Soundcrd.exe	92
PID 3704 wrote to memory of 2372	3704	Soundcrd.exe	92
PID 3704 wrote to memory of 2372	3704	Soundcrd.exe	92
PID 3704 wrote to memory of 2372	3704	Soundcrd.exe	92
PID 3704 wrote to memory of 2372	3704	Soundcrd.exe	92
PID 3704 wrote to memory of 2372	3704	Soundcrd.exe	92
PID 3704 wrote to memory of 2372	3704	Soundcrd.exe	92
PID 3704 wrote to memory of 2372	3704	Soundcrd.exe	92

C:\Users\Admin\AppData\Local\Temp\df7b910bbc8fdb3e6f99037236ac9c84b42c42639ccf9c63939a79b6457b6185N.exe
"C:\Users\Admin\AppData\Local\Temp\df7b910bbc8fdb3e6f99037236ac9c84b42c42639ccf9c63939a79b6457b6185N.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4212
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\TSrMX.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2652
- - 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:4180
- 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:3704
- - 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:3452
- - 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:2372

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