darkcomet | 3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efd

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:

3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe

Executes dropped EXE 3 IoCs

Processes:

Soundcrd.exeSoundcrd.exeSoundcrd.exe

pid	Process
2472	Soundcrd.exe
3624	Soundcrd.exe
3732	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-1-5-21-940901362-3608833189-1915618603-1000\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 2472 set thread context of 3624	2472	Soundcrd.exe	90
PID 2472 set thread context of 3732	2472	Soundcrd.exe	91

UPX packed file 20 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3624-36-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3624-33-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3624-37-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3624-39-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3624-40-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3732-49-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/3732-47-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/3732-44-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/3624-43-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3624-42-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3624-41-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3624-38-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3624-54-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3732-55-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/3624-60-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3624-64-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3624-68-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3624-72-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3624-76-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3624-80-0x0000000000400000-0x00000000004B5000-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:

Soundcrd.exeSoundcrd.exeSoundcrd.exe3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.execmd.exereg.exe

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	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.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

Processes:

Soundcrd.exe

description	ioc	Process
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
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	Soundcrd.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	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: SeIncreaseQuotaPrivilege	3624	Soundcrd.exe
Token: SeSecurityPrivilege	3624	Soundcrd.exe
Token: SeTakeOwnershipPrivilege	3624	Soundcrd.exe
Token: SeLoadDriverPrivilege	3624	Soundcrd.exe
Token: SeSystemProfilePrivilege	3624	Soundcrd.exe
Token: SeSystemtimePrivilege	3624	Soundcrd.exe
Token: SeProfSingleProcessPrivilege	3624	Soundcrd.exe
Token: SeIncBasePriorityPrivilege	3624	Soundcrd.exe
Token: SeCreatePagefilePrivilege	3624	Soundcrd.exe
Token: SeBackupPrivilege	3624	Soundcrd.exe
Token: SeRestorePrivilege	3624	Soundcrd.exe
Token: SeShutdownPrivilege	3624	Soundcrd.exe
Token: SeDebugPrivilege	3624	Soundcrd.exe
Token: SeSystemEnvironmentPrivilege	3624	Soundcrd.exe
Token: SeChangeNotifyPrivilege	3624	Soundcrd.exe
Token: SeRemoteShutdownPrivilege	3624	Soundcrd.exe
Token: SeUndockPrivilege	3624	Soundcrd.exe
Token: SeManageVolumePrivilege	3624	Soundcrd.exe
Token: SeImpersonatePrivilege	3624	Soundcrd.exe
Token: SeCreateGlobalPrivilege	3624	Soundcrd.exe
Token: 33	3624	Soundcrd.exe
Token: 34	3624	Soundcrd.exe
Token: 35	3624	Soundcrd.exe
Token: 36	3624	Soundcrd.exe
Token: SeDebugPrivilege	3732	Soundcrd.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exeSoundcrd.exeSoundcrd.exe

pid	Process
4532	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe
2472	Soundcrd.exe
3732	Soundcrd.exe

Suspicious use of WriteProcessMemory 25 IoCs

Processes:

3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.execmd.exeSoundcrd.exe

description	pid	Process	procid_target
PID 4532 wrote to memory of 2384	4532	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe	84
PID 4532 wrote to memory of 2384	4532	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe	84
PID 4532 wrote to memory of 2384	4532	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe	84
PID 2384 wrote to memory of 3976	2384	cmd.exe	88
PID 2384 wrote to memory of 3976	2384	cmd.exe	88
PID 2384 wrote to memory of 3976	2384	cmd.exe	88
PID 4532 wrote to memory of 2472	4532	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe	89
PID 4532 wrote to memory of 2472	4532	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe	89
PID 4532 wrote to memory of 2472	4532	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe	89
PID 2472 wrote to memory of 3624	2472	Soundcrd.exe	90
PID 2472 wrote to memory of 3624	2472	Soundcrd.exe	90
PID 2472 wrote to memory of 3624	2472	Soundcrd.exe	90
PID 2472 wrote to memory of 3624	2472	Soundcrd.exe	90
PID 2472 wrote to memory of 3624	2472	Soundcrd.exe	90
PID 2472 wrote to memory of 3624	2472	Soundcrd.exe	90
PID 2472 wrote to memory of 3624	2472	Soundcrd.exe	90
PID 2472 wrote to memory of 3624	2472	Soundcrd.exe	90
PID 2472 wrote to memory of 3732	2472	Soundcrd.exe	91
PID 2472 wrote to memory of 3732	2472	Soundcrd.exe	91
PID 2472 wrote to memory of 3732	2472	Soundcrd.exe	91
PID 2472 wrote to memory of 3732	2472	Soundcrd.exe	91
PID 2472 wrote to memory of 3732	2472	Soundcrd.exe	91
PID 2472 wrote to memory of 3732	2472	Soundcrd.exe	91
PID 2472 wrote to memory of 3732	2472	Soundcrd.exe	91
PID 2472 wrote to memory of 3732	2472	Soundcrd.exe	91

C:\Users\Admin\AppData\Local\Temp\3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe
"C:\Users\Admin\AppData\Local\Temp\3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4532
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\TolkG.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2384
- - 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:3976
- 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:2472
- - 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:3624
- - 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:3732

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