darkcomet | 0ab99bc90b4d5cfcdd8da560c7daa3768b21b3e63a53136a871155d6681409a8

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:

0ab99bc90b4d5cfcdd8da560c7daa3768b21b3e63a53136a871155d6681409a8N.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	0ab99bc90b4d5cfcdd8da560c7daa3768b21b3e63a53136a871155d6681409a8N.exe

Executes dropped EXE 3 IoCs

Processes:

Soundcrd.exeSoundcrd.exeSoundcrd.exe

pid	Process
2232	Soundcrd.exe
2004	Soundcrd.exe
1124	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-1-5-21-2045521122-590294423-3465680274-1000\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 2232 set thread context of 2004	2232	Soundcrd.exe	91
PID 2232 set thread context of 1124	2232	Soundcrd.exe	92

UPX packed file 19 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2004-35-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2004-36-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2004-32-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2004-38-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2004-42-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2004-41-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2004-40-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2004-39-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2004-37-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1124-43-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/1124-46-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/1124-48-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/2004-52-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1124-54-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/2004-57-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2004-61-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2004-65-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2004-69-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2004-73-0x0000000000400000-0x00000000004B5000-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:

0ab99bc90b4d5cfcdd8da560c7daa3768b21b3e63a53136a871155d6681409a8N.execmd.exereg.exeSoundcrd.exeSoundcrd.exeSoundcrd.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0ab99bc90b4d5cfcdd8da560c7daa3768b21b3e63a53136a871155d6681409a8N.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: SeIncreaseQuotaPrivilege	2004	Soundcrd.exe
Token: SeSecurityPrivilege	2004	Soundcrd.exe
Token: SeTakeOwnershipPrivilege	2004	Soundcrd.exe
Token: SeLoadDriverPrivilege	2004	Soundcrd.exe
Token: SeSystemProfilePrivilege	2004	Soundcrd.exe
Token: SeSystemtimePrivilege	2004	Soundcrd.exe
Token: SeProfSingleProcessPrivilege	2004	Soundcrd.exe
Token: SeIncBasePriorityPrivilege	2004	Soundcrd.exe
Token: SeCreatePagefilePrivilege	2004	Soundcrd.exe
Token: SeBackupPrivilege	2004	Soundcrd.exe
Token: SeRestorePrivilege	2004	Soundcrd.exe
Token: SeShutdownPrivilege	2004	Soundcrd.exe
Token: SeDebugPrivilege	2004	Soundcrd.exe
Token: SeSystemEnvironmentPrivilege	2004	Soundcrd.exe
Token: SeChangeNotifyPrivilege	2004	Soundcrd.exe
Token: SeRemoteShutdownPrivilege	2004	Soundcrd.exe
Token: SeUndockPrivilege	2004	Soundcrd.exe
Token: SeManageVolumePrivilege	2004	Soundcrd.exe
Token: SeImpersonatePrivilege	2004	Soundcrd.exe
Token: SeCreateGlobalPrivilege	2004	Soundcrd.exe
Token: 33	2004	Soundcrd.exe
Token: 34	2004	Soundcrd.exe
Token: 35	2004	Soundcrd.exe
Token: 36	2004	Soundcrd.exe
Token: SeDebugPrivilege	1124	Soundcrd.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

0ab99bc90b4d5cfcdd8da560c7daa3768b21b3e63a53136a871155d6681409a8N.exeSoundcrd.exeSoundcrd.exe

pid	Process
1096	0ab99bc90b4d5cfcdd8da560c7daa3768b21b3e63a53136a871155d6681409a8N.exe
2232	Soundcrd.exe
1124	Soundcrd.exe

Suspicious use of WriteProcessMemory 25 IoCs

Processes:

0ab99bc90b4d5cfcdd8da560c7daa3768b21b3e63a53136a871155d6681409a8N.execmd.exeSoundcrd.exe

description	pid	Process	procid_target
PID 1096 wrote to memory of 2656	1096	0ab99bc90b4d5cfcdd8da560c7daa3768b21b3e63a53136a871155d6681409a8N.exe	85
PID 1096 wrote to memory of 2656	1096	0ab99bc90b4d5cfcdd8da560c7daa3768b21b3e63a53136a871155d6681409a8N.exe	85
PID 1096 wrote to memory of 2656	1096	0ab99bc90b4d5cfcdd8da560c7daa3768b21b3e63a53136a871155d6681409a8N.exe	85
PID 2656 wrote to memory of 3664	2656	cmd.exe	88
PID 2656 wrote to memory of 3664	2656	cmd.exe	88
PID 2656 wrote to memory of 3664	2656	cmd.exe	88
PID 1096 wrote to memory of 2232	1096	0ab99bc90b4d5cfcdd8da560c7daa3768b21b3e63a53136a871155d6681409a8N.exe	90
PID 1096 wrote to memory of 2232	1096	0ab99bc90b4d5cfcdd8da560c7daa3768b21b3e63a53136a871155d6681409a8N.exe	90
PID 1096 wrote to memory of 2232	1096	0ab99bc90b4d5cfcdd8da560c7daa3768b21b3e63a53136a871155d6681409a8N.exe	90
PID 2232 wrote to memory of 2004	2232	Soundcrd.exe	91
PID 2232 wrote to memory of 2004	2232	Soundcrd.exe	91
PID 2232 wrote to memory of 2004	2232	Soundcrd.exe	91
PID 2232 wrote to memory of 2004	2232	Soundcrd.exe	91
PID 2232 wrote to memory of 2004	2232	Soundcrd.exe	91
PID 2232 wrote to memory of 2004	2232	Soundcrd.exe	91
PID 2232 wrote to memory of 2004	2232	Soundcrd.exe	91
PID 2232 wrote to memory of 2004	2232	Soundcrd.exe	91
PID 2232 wrote to memory of 1124	2232	Soundcrd.exe	92
PID 2232 wrote to memory of 1124	2232	Soundcrd.exe	92
PID 2232 wrote to memory of 1124	2232	Soundcrd.exe	92
PID 2232 wrote to memory of 1124	2232	Soundcrd.exe	92
PID 2232 wrote to memory of 1124	2232	Soundcrd.exe	92
PID 2232 wrote to memory of 1124	2232	Soundcrd.exe	92
PID 2232 wrote to memory of 1124	2232	Soundcrd.exe	92
PID 2232 wrote to memory of 1124	2232	Soundcrd.exe	92

C:\Users\Admin\AppData\Local\Temp\0ab99bc90b4d5cfcdd8da560c7daa3768b21b3e63a53136a871155d6681409a8N.exe
"C:\Users\Admin\AppData\Local\Temp\0ab99bc90b4d5cfcdd8da560c7daa3768b21b3e63a53136a871155d6681409a8N.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1096
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\nlkds.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2656
- - 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:3664
- 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:2232
- - 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:2004
- - 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:1124

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