darkcomet | 434ae7373a4cd2b22fe61df860b8e2e8d5b4a5656f0128e76a5aa59c2c998dfd

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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	434ae7373a4cd2b22fe61df860b8e2e8d5b4a5656f0128e76a5aa59c2c998dfdN.exe

Executes dropped EXE 3 IoCs

pid	Process
3472	Soundcrd.exe
1188	Soundcrd.exe
3140	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-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Mcrosoftt = "C:\\Users\\Admin\\AppData\\Roaming\\Soundcrd.exe"	reg.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3472 set thread context of 1188	3472	Soundcrd.exe	88
PID 3472 set thread context of 3140	3472	Soundcrd.exe	89

UPX packed file 23 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5088-0-0x0000000000400000-0x00000000007EC000-memory.dmp	upx
behavioral2/files/0x0008000000023ca1-16.dat	upx
behavioral2/memory/5088-28-0x0000000000400000-0x00000000007EC000-memory.dmp	upx
behavioral2/memory/1188-31-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1188-34-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1188-35-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1188-37-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1188-38-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1188-41-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3140-46-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/3140-48-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/3472-51-0x0000000000400000-0x00000000007EC000-memory.dmp	upx
behavioral2/memory/3140-42-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/1188-39-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1188-40-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1188-36-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1188-52-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3140-53-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/1188-58-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1188-62-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1188-66-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1188-70-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1188-74-0x0000000000400000-0x00000000004B5000-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	434ae7373a4cd2b22fe61df860b8e2e8d5b4a5656f0128e76a5aa59c2c998dfdN.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	1188	Soundcrd.exe
Token: SeSecurityPrivilege	1188	Soundcrd.exe
Token: SeTakeOwnershipPrivilege	1188	Soundcrd.exe
Token: SeLoadDriverPrivilege	1188	Soundcrd.exe
Token: SeSystemProfilePrivilege	1188	Soundcrd.exe
Token: SeSystemtimePrivilege	1188	Soundcrd.exe
Token: SeProfSingleProcessPrivilege	1188	Soundcrd.exe
Token: SeIncBasePriorityPrivilege	1188	Soundcrd.exe
Token: SeCreatePagefilePrivilege	1188	Soundcrd.exe
Token: SeBackupPrivilege	1188	Soundcrd.exe
Token: SeRestorePrivilege	1188	Soundcrd.exe
Token: SeShutdownPrivilege	1188	Soundcrd.exe
Token: SeDebugPrivilege	1188	Soundcrd.exe
Token: SeSystemEnvironmentPrivilege	1188	Soundcrd.exe
Token: SeChangeNotifyPrivilege	1188	Soundcrd.exe
Token: SeRemoteShutdownPrivilege	1188	Soundcrd.exe
Token: SeUndockPrivilege	1188	Soundcrd.exe
Token: SeManageVolumePrivilege	1188	Soundcrd.exe
Token: SeImpersonatePrivilege	1188	Soundcrd.exe
Token: SeCreateGlobalPrivilege	1188	Soundcrd.exe
Token: 33	1188	Soundcrd.exe
Token: 34	1188	Soundcrd.exe
Token: 35	1188	Soundcrd.exe
Token: 36	1188	Soundcrd.exe
Token: SeDebugPrivilege	3140	Soundcrd.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
5088	434ae7373a4cd2b22fe61df860b8e2e8d5b4a5656f0128e76a5aa59c2c998dfdN.exe
3472	Soundcrd.exe
3140	Soundcrd.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 5088 wrote to memory of 3364	5088	434ae7373a4cd2b22fe61df860b8e2e8d5b4a5656f0128e76a5aa59c2c998dfdN.exe	83
PID 5088 wrote to memory of 3364	5088	434ae7373a4cd2b22fe61df860b8e2e8d5b4a5656f0128e76a5aa59c2c998dfdN.exe	83
PID 5088 wrote to memory of 3364	5088	434ae7373a4cd2b22fe61df860b8e2e8d5b4a5656f0128e76a5aa59c2c998dfdN.exe	83
PID 3364 wrote to memory of 216	3364	cmd.exe	86
PID 3364 wrote to memory of 216	3364	cmd.exe	86
PID 3364 wrote to memory of 216	3364	cmd.exe	86
PID 5088 wrote to memory of 3472	5088	434ae7373a4cd2b22fe61df860b8e2e8d5b4a5656f0128e76a5aa59c2c998dfdN.exe	87
PID 5088 wrote to memory of 3472	5088	434ae7373a4cd2b22fe61df860b8e2e8d5b4a5656f0128e76a5aa59c2c998dfdN.exe	87
PID 5088 wrote to memory of 3472	5088	434ae7373a4cd2b22fe61df860b8e2e8d5b4a5656f0128e76a5aa59c2c998dfdN.exe	87
PID 3472 wrote to memory of 1188	3472	Soundcrd.exe	88
PID 3472 wrote to memory of 1188	3472	Soundcrd.exe	88
PID 3472 wrote to memory of 1188	3472	Soundcrd.exe	88
PID 3472 wrote to memory of 1188	3472	Soundcrd.exe	88
PID 3472 wrote to memory of 1188	3472	Soundcrd.exe	88
PID 3472 wrote to memory of 1188	3472	Soundcrd.exe	88
PID 3472 wrote to memory of 1188	3472	Soundcrd.exe	88
PID 3472 wrote to memory of 1188	3472	Soundcrd.exe	88
PID 3472 wrote to memory of 3140	3472	Soundcrd.exe	89
PID 3472 wrote to memory of 3140	3472	Soundcrd.exe	89
PID 3472 wrote to memory of 3140	3472	Soundcrd.exe	89
PID 3472 wrote to memory of 3140	3472	Soundcrd.exe	89
PID 3472 wrote to memory of 3140	3472	Soundcrd.exe	89
PID 3472 wrote to memory of 3140	3472	Soundcrd.exe	89
PID 3472 wrote to memory of 3140	3472	Soundcrd.exe	89
PID 3472 wrote to memory of 3140	3472	Soundcrd.exe	89

C:\Users\Admin\AppData\Local\Temp\434ae7373a4cd2b22fe61df860b8e2e8d5b4a5656f0128e76a5aa59c2c998dfdN.exe
"C:\Users\Admin\AppData\Local\Temp\434ae7373a4cd2b22fe61df860b8e2e8d5b4a5656f0128e76a5aa59c2c998dfdN.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5088
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\qZTSN.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3364
- - 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:216
- 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:3472
- - 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:1188
- - 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:3140

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