darkcomet | d836095ef4a7e6672d0b3103a311398ca07db68851a55e9613701f12c8536d3f

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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	d836095ef4a7e6672d0b3103a311398ca07db68851a55e9613701f12c8536d3fN.exe

Executes dropped EXE 3 IoCs

pid	Process
1316	Soundcrd.exe
1136	Soundcrd.exe
1916	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-1-5-21-3350944739-639801879-157714471-1000\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 1316 set thread context of 1136	1316	Soundcrd.exe	88
PID 1316 set thread context of 1916	1316	Soundcrd.exe	89

UPX packed file 18 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1136-33-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1136-36-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1916-37-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/1136-38-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1916-44-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/1916-41-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/1136-49-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1136-48-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1136-50-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1136-52-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1136-51-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1136-53-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1916-54-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/1136-59-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1136-63-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1136-67-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1136-71-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/1136-75-0x0000000000400000-0x00000000004B5000-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	d836095ef4a7e6672d0b3103a311398ca07db68851a55e9613701f12c8536d3fN.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

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	1916	Soundcrd.exe
Token: SeIncreaseQuotaPrivilege	1136	Soundcrd.exe
Token: SeSecurityPrivilege	1136	Soundcrd.exe
Token: SeTakeOwnershipPrivilege	1136	Soundcrd.exe
Token: SeLoadDriverPrivilege	1136	Soundcrd.exe
Token: SeSystemProfilePrivilege	1136	Soundcrd.exe
Token: SeSystemtimePrivilege	1136	Soundcrd.exe
Token: SeProfSingleProcessPrivilege	1136	Soundcrd.exe
Token: SeIncBasePriorityPrivilege	1136	Soundcrd.exe
Token: SeCreatePagefilePrivilege	1136	Soundcrd.exe
Token: SeBackupPrivilege	1136	Soundcrd.exe
Token: SeRestorePrivilege	1136	Soundcrd.exe
Token: SeShutdownPrivilege	1136	Soundcrd.exe
Token: SeDebugPrivilege	1136	Soundcrd.exe
Token: SeSystemEnvironmentPrivilege	1136	Soundcrd.exe
Token: SeChangeNotifyPrivilege	1136	Soundcrd.exe
Token: SeRemoteShutdownPrivilege	1136	Soundcrd.exe
Token: SeUndockPrivilege	1136	Soundcrd.exe
Token: SeManageVolumePrivilege	1136	Soundcrd.exe
Token: SeImpersonatePrivilege	1136	Soundcrd.exe
Token: SeCreateGlobalPrivilege	1136	Soundcrd.exe
Token: 33	1136	Soundcrd.exe
Token: 34	1136	Soundcrd.exe
Token: 35	1136	Soundcrd.exe
Token: 36	1136	Soundcrd.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2736	d836095ef4a7e6672d0b3103a311398ca07db68851a55e9613701f12c8536d3fN.exe
1316	Soundcrd.exe
1916	Soundcrd.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2736 wrote to memory of 1872	2736	d836095ef4a7e6672d0b3103a311398ca07db68851a55e9613701f12c8536d3fN.exe	83
PID 2736 wrote to memory of 1872	2736	d836095ef4a7e6672d0b3103a311398ca07db68851a55e9613701f12c8536d3fN.exe	83
PID 2736 wrote to memory of 1872	2736	d836095ef4a7e6672d0b3103a311398ca07db68851a55e9613701f12c8536d3fN.exe	83
PID 1872 wrote to memory of 448	1872	cmd.exe	86
PID 1872 wrote to memory of 448	1872	cmd.exe	86
PID 1872 wrote to memory of 448	1872	cmd.exe	86
PID 2736 wrote to memory of 1316	2736	d836095ef4a7e6672d0b3103a311398ca07db68851a55e9613701f12c8536d3fN.exe	87
PID 2736 wrote to memory of 1316	2736	d836095ef4a7e6672d0b3103a311398ca07db68851a55e9613701f12c8536d3fN.exe	87
PID 2736 wrote to memory of 1316	2736	d836095ef4a7e6672d0b3103a311398ca07db68851a55e9613701f12c8536d3fN.exe	87
PID 1316 wrote to memory of 1136	1316	Soundcrd.exe	88
PID 1316 wrote to memory of 1136	1316	Soundcrd.exe	88
PID 1316 wrote to memory of 1136	1316	Soundcrd.exe	88
PID 1316 wrote to memory of 1136	1316	Soundcrd.exe	88
PID 1316 wrote to memory of 1136	1316	Soundcrd.exe	88
PID 1316 wrote to memory of 1136	1316	Soundcrd.exe	88
PID 1316 wrote to memory of 1136	1316	Soundcrd.exe	88
PID 1316 wrote to memory of 1136	1316	Soundcrd.exe	88
PID 1316 wrote to memory of 1916	1316	Soundcrd.exe	89
PID 1316 wrote to memory of 1916	1316	Soundcrd.exe	89
PID 1316 wrote to memory of 1916	1316	Soundcrd.exe	89
PID 1316 wrote to memory of 1916	1316	Soundcrd.exe	89
PID 1316 wrote to memory of 1916	1316	Soundcrd.exe	89
PID 1316 wrote to memory of 1916	1316	Soundcrd.exe	89
PID 1316 wrote to memory of 1916	1316	Soundcrd.exe	89
PID 1316 wrote to memory of 1916	1316	Soundcrd.exe	89

C:\Users\Admin\AppData\Local\Temp\d836095ef4a7e6672d0b3103a311398ca07db68851a55e9613701f12c8536d3fN.exe
"C:\Users\Admin\AppData\Local\Temp\d836095ef4a7e6672d0b3103a311398ca07db68851a55e9613701f12c8536d3fN.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2736
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\GBAKJ.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1872
- - 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:448
- 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:1316
- - 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:1136
- - 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:1916

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