darkcomet | fdd86b41fae7d1c24c68f4f0937b59f71dd66d314a7dc2b49e259c0605b1f9e6

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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	fdd86b41fae7d1c24c68f4f0937b59f71dd66d314a7dc2b49e259c0605b1f9e6.exe

Executes dropped EXE 3 IoCs

pid	Process
4952	Soundcrd.exe
2460	Soundcrd.exe
4436	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-1-5-21-3756129449-3121373848-4276368241-1000\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 4952 set thread context of 2460	4952	Soundcrd.exe	87
PID 4952 set thread context of 4436	4952	Soundcrd.exe	88

UPX packed file 19 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2460-31-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2460-34-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2460-36-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2460-38-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4436-41-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/4436-45-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/2460-49-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2460-48-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2460-46-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2460-44-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2460-43-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4436-35-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/2460-52-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4436-53-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/2460-58-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2460-62-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2460-66-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2460-70-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2460-74-0x0000000000400000-0x00000000004B5000-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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fdd86b41fae7d1c24c68f4f0937b59f71dd66d314a7dc2b49e259c0605b1f9e6.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: SeIncreaseQuotaPrivilege	2460	Soundcrd.exe
Token: SeSecurityPrivilege	2460	Soundcrd.exe
Token: SeTakeOwnershipPrivilege	2460	Soundcrd.exe
Token: SeLoadDriverPrivilege	2460	Soundcrd.exe
Token: SeSystemProfilePrivilege	2460	Soundcrd.exe
Token: SeSystemtimePrivilege	2460	Soundcrd.exe
Token: SeProfSingleProcessPrivilege	2460	Soundcrd.exe
Token: SeIncBasePriorityPrivilege	2460	Soundcrd.exe
Token: SeCreatePagefilePrivilege	2460	Soundcrd.exe
Token: SeBackupPrivilege	2460	Soundcrd.exe
Token: SeRestorePrivilege	2460	Soundcrd.exe
Token: SeShutdownPrivilege	2460	Soundcrd.exe
Token: SeDebugPrivilege	2460	Soundcrd.exe
Token: SeSystemEnvironmentPrivilege	2460	Soundcrd.exe
Token: SeChangeNotifyPrivilege	2460	Soundcrd.exe
Token: SeRemoteShutdownPrivilege	2460	Soundcrd.exe
Token: SeUndockPrivilege	2460	Soundcrd.exe
Token: SeManageVolumePrivilege	2460	Soundcrd.exe
Token: SeImpersonatePrivilege	2460	Soundcrd.exe
Token: SeCreateGlobalPrivilege	2460	Soundcrd.exe
Token: 33	2460	Soundcrd.exe
Token: 34	2460	Soundcrd.exe
Token: 35	2460	Soundcrd.exe
Token: 36	2460	Soundcrd.exe
Token: SeDebugPrivilege	4436	Soundcrd.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
4592	fdd86b41fae7d1c24c68f4f0937b59f71dd66d314a7dc2b49e259c0605b1f9e6.exe
4952	Soundcrd.exe
4436	Soundcrd.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 4592 wrote to memory of 1568	4592	fdd86b41fae7d1c24c68f4f0937b59f71dd66d314a7dc2b49e259c0605b1f9e6.exe	82
PID 4592 wrote to memory of 1568	4592	fdd86b41fae7d1c24c68f4f0937b59f71dd66d314a7dc2b49e259c0605b1f9e6.exe	82
PID 4592 wrote to memory of 1568	4592	fdd86b41fae7d1c24c68f4f0937b59f71dd66d314a7dc2b49e259c0605b1f9e6.exe	82
PID 1568 wrote to memory of 1876	1568	cmd.exe	85
PID 1568 wrote to memory of 1876	1568	cmd.exe	85
PID 1568 wrote to memory of 1876	1568	cmd.exe	85
PID 4592 wrote to memory of 4952	4592	fdd86b41fae7d1c24c68f4f0937b59f71dd66d314a7dc2b49e259c0605b1f9e6.exe	86
PID 4592 wrote to memory of 4952	4592	fdd86b41fae7d1c24c68f4f0937b59f71dd66d314a7dc2b49e259c0605b1f9e6.exe	86
PID 4592 wrote to memory of 4952	4592	fdd86b41fae7d1c24c68f4f0937b59f71dd66d314a7dc2b49e259c0605b1f9e6.exe	86
PID 4952 wrote to memory of 2460	4952	Soundcrd.exe	87
PID 4952 wrote to memory of 2460	4952	Soundcrd.exe	87
PID 4952 wrote to memory of 2460	4952	Soundcrd.exe	87
PID 4952 wrote to memory of 2460	4952	Soundcrd.exe	87
PID 4952 wrote to memory of 2460	4952	Soundcrd.exe	87
PID 4952 wrote to memory of 2460	4952	Soundcrd.exe	87
PID 4952 wrote to memory of 2460	4952	Soundcrd.exe	87
PID 4952 wrote to memory of 2460	4952	Soundcrd.exe	87
PID 4952 wrote to memory of 4436	4952	Soundcrd.exe	88
PID 4952 wrote to memory of 4436	4952	Soundcrd.exe	88
PID 4952 wrote to memory of 4436	4952	Soundcrd.exe	88
PID 4952 wrote to memory of 4436	4952	Soundcrd.exe	88
PID 4952 wrote to memory of 4436	4952	Soundcrd.exe	88
PID 4952 wrote to memory of 4436	4952	Soundcrd.exe	88
PID 4952 wrote to memory of 4436	4952	Soundcrd.exe	88
PID 4952 wrote to memory of 4436	4952	Soundcrd.exe	88

C:\Users\Admin\AppData\Local\Temp\fdd86b41fae7d1c24c68f4f0937b59f71dd66d314a7dc2b49e259c0605b1f9e6.exe
"C:\Users\Admin\AppData\Local\Temp\fdd86b41fae7d1c24c68f4f0937b59f71dd66d314a7dc2b49e259c0605b1f9e6.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4592
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\oleXV.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1568
- - 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:1876
- 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:4952
- - 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:2460
- - 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:4436

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