darkcomet | 3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efd

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:

3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe

Executes dropped EXE 3 IoCs

Processes:

Soundcrd.exeSoundcrd.exeSoundcrd.exe

pid	Process
1176	Soundcrd.exe
464	Soundcrd.exe
4680	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-1-5-21-2878641211-696417878-3864914810-1000\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 1176 set thread context of 464	1176	Soundcrd.exe	91
PID 1176 set thread context of 4680	1176	Soundcrd.exe	92

UPX packed file 18 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/464-32-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/464-35-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/464-36-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4680-37-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/4680-42-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/4680-40-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/464-44-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/464-43-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/464-49-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/464-51-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/464-50-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/464-52-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4680-53-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/464-58-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/464-62-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/464-66-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/464-70-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/464-74-0x0000000000400000-0x00000000004B5000-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

Processes:

reg.exeSoundcrd.exeSoundcrd.exeSoundcrd.exe3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.execmd.exe

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	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.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

Processes:

Soundcrd.exe

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

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: SeDebugPrivilege	4680	Soundcrd.exe
Token: SeIncreaseQuotaPrivilege	464	Soundcrd.exe
Token: SeSecurityPrivilege	464	Soundcrd.exe
Token: SeTakeOwnershipPrivilege	464	Soundcrd.exe
Token: SeLoadDriverPrivilege	464	Soundcrd.exe
Token: SeSystemProfilePrivilege	464	Soundcrd.exe
Token: SeSystemtimePrivilege	464	Soundcrd.exe
Token: SeProfSingleProcessPrivilege	464	Soundcrd.exe
Token: SeIncBasePriorityPrivilege	464	Soundcrd.exe
Token: SeCreatePagefilePrivilege	464	Soundcrd.exe
Token: SeBackupPrivilege	464	Soundcrd.exe
Token: SeRestorePrivilege	464	Soundcrd.exe
Token: SeShutdownPrivilege	464	Soundcrd.exe
Token: SeDebugPrivilege	464	Soundcrd.exe
Token: SeSystemEnvironmentPrivilege	464	Soundcrd.exe
Token: SeChangeNotifyPrivilege	464	Soundcrd.exe
Token: SeRemoteShutdownPrivilege	464	Soundcrd.exe
Token: SeUndockPrivilege	464	Soundcrd.exe
Token: SeManageVolumePrivilege	464	Soundcrd.exe
Token: SeImpersonatePrivilege	464	Soundcrd.exe
Token: SeCreateGlobalPrivilege	464	Soundcrd.exe
Token: 33	464	Soundcrd.exe
Token: 34	464	Soundcrd.exe
Token: 35	464	Soundcrd.exe
Token: 36	464	Soundcrd.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exeSoundcrd.exeSoundcrd.exe

pid	Process
4004	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe
1176	Soundcrd.exe
4680	Soundcrd.exe

Suspicious use of WriteProcessMemory 25 IoCs

Processes:

3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.execmd.exeSoundcrd.exe

description	pid	Process	procid_target
PID 4004 wrote to memory of 2436	4004	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe	86
PID 4004 wrote to memory of 2436	4004	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe	86
PID 4004 wrote to memory of 2436	4004	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe	86
PID 2436 wrote to memory of 1268	2436	cmd.exe	89
PID 2436 wrote to memory of 1268	2436	cmd.exe	89
PID 2436 wrote to memory of 1268	2436	cmd.exe	89
PID 4004 wrote to memory of 1176	4004	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe	90
PID 4004 wrote to memory of 1176	4004	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe	90
PID 4004 wrote to memory of 1176	4004	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe	90
PID 1176 wrote to memory of 464	1176	Soundcrd.exe	91
PID 1176 wrote to memory of 464	1176	Soundcrd.exe	91
PID 1176 wrote to memory of 464	1176	Soundcrd.exe	91
PID 1176 wrote to memory of 464	1176	Soundcrd.exe	91
PID 1176 wrote to memory of 464	1176	Soundcrd.exe	91
PID 1176 wrote to memory of 464	1176	Soundcrd.exe	91
PID 1176 wrote to memory of 464	1176	Soundcrd.exe	91
PID 1176 wrote to memory of 464	1176	Soundcrd.exe	91
PID 1176 wrote to memory of 4680	1176	Soundcrd.exe	92
PID 1176 wrote to memory of 4680	1176	Soundcrd.exe	92
PID 1176 wrote to memory of 4680	1176	Soundcrd.exe	92
PID 1176 wrote to memory of 4680	1176	Soundcrd.exe	92
PID 1176 wrote to memory of 4680	1176	Soundcrd.exe	92
PID 1176 wrote to memory of 4680	1176	Soundcrd.exe	92
PID 1176 wrote to memory of 4680	1176	Soundcrd.exe	92
PID 1176 wrote to memory of 4680	1176	Soundcrd.exe	92

C:\Users\Admin\AppData\Local\Temp\3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe
"C:\Users\Admin\AppData\Local\Temp\3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4004
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\ZDnMH.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2436
- - 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:1268
- 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:1176
- - 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:464
- - 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:4680

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