darkcomet | 6143c99a689ffba264343e77296ddb5634f8e4076758745e0dcfbb48dfce52e6

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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	6143c99a689ffba264343e77296ddb5634f8e4076758745e0dcfbb48dfce52e6N.exe

Executes dropped EXE 3 IoCs

pid	Process
3224	Soundcrd.exe
5060	Soundcrd.exe
5068	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-1-5-21-4089630652-1596403869-279772308-1000\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 3224 set thread context of 5060	3224	Soundcrd.exe	87
PID 3224 set thread context of 5068	3224	Soundcrd.exe	88

UPX packed file 18 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5060-36-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/5060-33-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/5068-38-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/5060-37-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/5068-43-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/5068-42-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/5060-47-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/5060-50-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/5060-49-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/5060-52-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/5060-51-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/5060-53-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/5068-54-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/5060-59-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/5060-63-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/5060-67-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/5060-71-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/5060-75-0x0000000000400000-0x00000000004B5000-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	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	6143c99a689ffba264343e77296ddb5634f8e4076758745e0dcfbb48dfce52e6N.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

description	ioc	Process
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
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	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	5068	Soundcrd.exe
Token: SeIncreaseQuotaPrivilege	5060	Soundcrd.exe
Token: SeSecurityPrivilege	5060	Soundcrd.exe
Token: SeTakeOwnershipPrivilege	5060	Soundcrd.exe
Token: SeLoadDriverPrivilege	5060	Soundcrd.exe
Token: SeSystemProfilePrivilege	5060	Soundcrd.exe
Token: SeSystemtimePrivilege	5060	Soundcrd.exe
Token: SeProfSingleProcessPrivilege	5060	Soundcrd.exe
Token: SeIncBasePriorityPrivilege	5060	Soundcrd.exe
Token: SeCreatePagefilePrivilege	5060	Soundcrd.exe
Token: SeBackupPrivilege	5060	Soundcrd.exe
Token: SeRestorePrivilege	5060	Soundcrd.exe
Token: SeShutdownPrivilege	5060	Soundcrd.exe
Token: SeDebugPrivilege	5060	Soundcrd.exe
Token: SeSystemEnvironmentPrivilege	5060	Soundcrd.exe
Token: SeChangeNotifyPrivilege	5060	Soundcrd.exe
Token: SeRemoteShutdownPrivilege	5060	Soundcrd.exe
Token: SeUndockPrivilege	5060	Soundcrd.exe
Token: SeManageVolumePrivilege	5060	Soundcrd.exe
Token: SeImpersonatePrivilege	5060	Soundcrd.exe
Token: SeCreateGlobalPrivilege	5060	Soundcrd.exe
Token: 33	5060	Soundcrd.exe
Token: 34	5060	Soundcrd.exe
Token: 35	5060	Soundcrd.exe
Token: 36	5060	Soundcrd.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
3240	6143c99a689ffba264343e77296ddb5634f8e4076758745e0dcfbb48dfce52e6N.exe
3224	Soundcrd.exe
5068	Soundcrd.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 3240 wrote to memory of 2268	3240	6143c99a689ffba264343e77296ddb5634f8e4076758745e0dcfbb48dfce52e6N.exe	82
PID 3240 wrote to memory of 2268	3240	6143c99a689ffba264343e77296ddb5634f8e4076758745e0dcfbb48dfce52e6N.exe	82
PID 3240 wrote to memory of 2268	3240	6143c99a689ffba264343e77296ddb5634f8e4076758745e0dcfbb48dfce52e6N.exe	82
PID 2268 wrote to memory of 4648	2268	cmd.exe	85
PID 2268 wrote to memory of 4648	2268	cmd.exe	85
PID 2268 wrote to memory of 4648	2268	cmd.exe	85
PID 3240 wrote to memory of 3224	3240	6143c99a689ffba264343e77296ddb5634f8e4076758745e0dcfbb48dfce52e6N.exe	86
PID 3240 wrote to memory of 3224	3240	6143c99a689ffba264343e77296ddb5634f8e4076758745e0dcfbb48dfce52e6N.exe	86
PID 3240 wrote to memory of 3224	3240	6143c99a689ffba264343e77296ddb5634f8e4076758745e0dcfbb48dfce52e6N.exe	86
PID 3224 wrote to memory of 5060	3224	Soundcrd.exe	87
PID 3224 wrote to memory of 5060	3224	Soundcrd.exe	87
PID 3224 wrote to memory of 5060	3224	Soundcrd.exe	87
PID 3224 wrote to memory of 5060	3224	Soundcrd.exe	87
PID 3224 wrote to memory of 5060	3224	Soundcrd.exe	87
PID 3224 wrote to memory of 5060	3224	Soundcrd.exe	87
PID 3224 wrote to memory of 5060	3224	Soundcrd.exe	87
PID 3224 wrote to memory of 5060	3224	Soundcrd.exe	87
PID 3224 wrote to memory of 5068	3224	Soundcrd.exe	88
PID 3224 wrote to memory of 5068	3224	Soundcrd.exe	88
PID 3224 wrote to memory of 5068	3224	Soundcrd.exe	88
PID 3224 wrote to memory of 5068	3224	Soundcrd.exe	88
PID 3224 wrote to memory of 5068	3224	Soundcrd.exe	88
PID 3224 wrote to memory of 5068	3224	Soundcrd.exe	88
PID 3224 wrote to memory of 5068	3224	Soundcrd.exe	88
PID 3224 wrote to memory of 5068	3224	Soundcrd.exe	88

C:\Users\Admin\AppData\Local\Temp\6143c99a689ffba264343e77296ddb5634f8e4076758745e0dcfbb48dfce52e6N.exe
"C:\Users\Admin\AppData\Local\Temp\6143c99a689ffba264343e77296ddb5634f8e4076758745e0dcfbb48dfce52e6N.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3240
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\eXGsu.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2268
- - 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:4648
- 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:3224
- - 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:5060
- - 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:5068

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