darkcomet | d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9

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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe

Executes dropped EXE 3 IoCs

pid	Process
2404	Soundcrd.exe
3216	Soundcrd.exe
3344	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-1-5-21-4050598569-1597076380-177084960-1000\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 2404 set thread context of 3216	2404	Soundcrd.exe	94
PID 2404 set thread context of 3344	2404	Soundcrd.exe	95

UPX packed file 20 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3216-34-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3216-37-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3216-35-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3216-40-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3216-42-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3216-41-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3216-39-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3216-38-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3216-31-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3344-47-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/3344-43-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/3344-48-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/3216-52-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3344-54-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/3216-57-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3216-61-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3216-65-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3216-69-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3216-73-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3216-77-0x0000000000400000-0x00000000004B5000-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	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	d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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	3216	Soundcrd.exe
Token: SeSecurityPrivilege	3216	Soundcrd.exe
Token: SeTakeOwnershipPrivilege	3216	Soundcrd.exe
Token: SeLoadDriverPrivilege	3216	Soundcrd.exe
Token: SeSystemProfilePrivilege	3216	Soundcrd.exe
Token: SeSystemtimePrivilege	3216	Soundcrd.exe
Token: SeProfSingleProcessPrivilege	3216	Soundcrd.exe
Token: SeIncBasePriorityPrivilege	3216	Soundcrd.exe
Token: SeCreatePagefilePrivilege	3216	Soundcrd.exe
Token: SeBackupPrivilege	3216	Soundcrd.exe
Token: SeRestorePrivilege	3216	Soundcrd.exe
Token: SeShutdownPrivilege	3216	Soundcrd.exe
Token: SeDebugPrivilege	3216	Soundcrd.exe
Token: SeSystemEnvironmentPrivilege	3216	Soundcrd.exe
Token: SeChangeNotifyPrivilege	3216	Soundcrd.exe
Token: SeRemoteShutdownPrivilege	3216	Soundcrd.exe
Token: SeUndockPrivilege	3216	Soundcrd.exe
Token: SeManageVolumePrivilege	3216	Soundcrd.exe
Token: SeImpersonatePrivilege	3216	Soundcrd.exe
Token: SeCreateGlobalPrivilege	3216	Soundcrd.exe
Token: 33	3216	Soundcrd.exe
Token: 34	3216	Soundcrd.exe
Token: 35	3216	Soundcrd.exe
Token: 36	3216	Soundcrd.exe
Token: SeDebugPrivilege	3344	Soundcrd.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
3748	d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe
2404	Soundcrd.exe
3344	Soundcrd.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 3748 wrote to memory of 4852	3748	d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe	89
PID 3748 wrote to memory of 4852	3748	d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe	89
PID 3748 wrote to memory of 4852	3748	d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe	89
PID 4852 wrote to memory of 1920	4852	cmd.exe	92
PID 4852 wrote to memory of 1920	4852	cmd.exe	92
PID 4852 wrote to memory of 1920	4852	cmd.exe	92
PID 3748 wrote to memory of 2404	3748	d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe	93
PID 3748 wrote to memory of 2404	3748	d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe	93
PID 3748 wrote to memory of 2404	3748	d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe	93
PID 2404 wrote to memory of 3216	2404	Soundcrd.exe	94
PID 2404 wrote to memory of 3216	2404	Soundcrd.exe	94
PID 2404 wrote to memory of 3216	2404	Soundcrd.exe	94
PID 2404 wrote to memory of 3216	2404	Soundcrd.exe	94
PID 2404 wrote to memory of 3216	2404	Soundcrd.exe	94
PID 2404 wrote to memory of 3216	2404	Soundcrd.exe	94
PID 2404 wrote to memory of 3216	2404	Soundcrd.exe	94
PID 2404 wrote to memory of 3216	2404	Soundcrd.exe	94
PID 2404 wrote to memory of 3344	2404	Soundcrd.exe	95
PID 2404 wrote to memory of 3344	2404	Soundcrd.exe	95
PID 2404 wrote to memory of 3344	2404	Soundcrd.exe	95
PID 2404 wrote to memory of 3344	2404	Soundcrd.exe	95
PID 2404 wrote to memory of 3344	2404	Soundcrd.exe	95
PID 2404 wrote to memory of 3344	2404	Soundcrd.exe	95
PID 2404 wrote to memory of 3344	2404	Soundcrd.exe	95
PID 2404 wrote to memory of 3344	2404	Soundcrd.exe	95

C:\Users\Admin\AppData\Local\Temp\d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe
"C:\Users\Admin\AppData\Local\Temp\d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3748
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\Xsuyh.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4852
- - 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:1920
- 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:2404
- - 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:3216
- - 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:3344

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