darkcomet | 2ab0496f028ab7d556cf1bedb6d9c1f576652e6db08f1bf466f1a67483934851

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:

65db97bc471b2c790aaabb6f4501d8b0_NEAS.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	65db97bc471b2c790aaabb6f4501d8b0_NEAS.exe

Executes dropped EXE 3 IoCs

Processes:

Soundcrd.exeSoundcrd.exeSoundcrd.exe

pid	Process
2204	Soundcrd.exe
4896	Soundcrd.exe
2804	Soundcrd.exe

UPX packed file 23 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1968-0-0x0000000000400000-0x00000000007EB000-memory.dmp	upx
behavioral2/files/0x000b000000023b95-16.dat	upx
behavioral2/memory/1968-29-0x0000000000400000-0x00000000007EB000-memory.dmp	upx
behavioral2/memory/4896-32-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4896-35-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2804-37-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/4896-36-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2804-40-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/2804-42-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/4896-48-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4896-47-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4896-51-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4896-50-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4896-49-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2204-46-0x0000000000400000-0x00000000007EB000-memory.dmp	upx
behavioral2/memory/4896-52-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2804-53-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/4896-56-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4896-60-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4896-64-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4896-68-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4896-72-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4896-76-0x0000000000400000-0x00000000004B5000-memory.dmp	upx

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-1-5-21-2818691465-3043947619-2475182763-1000\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 2204 set thread context of 4896	2204	Soundcrd.exe	89
PID 2204 set thread context of 2804	2204	Soundcrd.exe	90

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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\Identifier	Soundcrd.exe
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

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	2804	Soundcrd.exe
Token: SeIncreaseQuotaPrivilege	4896	Soundcrd.exe
Token: SeSecurityPrivilege	4896	Soundcrd.exe
Token: SeTakeOwnershipPrivilege	4896	Soundcrd.exe
Token: SeLoadDriverPrivilege	4896	Soundcrd.exe
Token: SeSystemProfilePrivilege	4896	Soundcrd.exe
Token: SeSystemtimePrivilege	4896	Soundcrd.exe
Token: SeProfSingleProcessPrivilege	4896	Soundcrd.exe
Token: SeIncBasePriorityPrivilege	4896	Soundcrd.exe
Token: SeCreatePagefilePrivilege	4896	Soundcrd.exe
Token: SeBackupPrivilege	4896	Soundcrd.exe
Token: SeRestorePrivilege	4896	Soundcrd.exe
Token: SeShutdownPrivilege	4896	Soundcrd.exe
Token: SeDebugPrivilege	4896	Soundcrd.exe
Token: SeSystemEnvironmentPrivilege	4896	Soundcrd.exe
Token: SeChangeNotifyPrivilege	4896	Soundcrd.exe
Token: SeRemoteShutdownPrivilege	4896	Soundcrd.exe
Token: SeUndockPrivilege	4896	Soundcrd.exe
Token: SeManageVolumePrivilege	4896	Soundcrd.exe
Token: SeImpersonatePrivilege	4896	Soundcrd.exe
Token: SeCreateGlobalPrivilege	4896	Soundcrd.exe
Token: 33	4896	Soundcrd.exe
Token: 34	4896	Soundcrd.exe
Token: 35	4896	Soundcrd.exe
Token: 36	4896	Soundcrd.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

65db97bc471b2c790aaabb6f4501d8b0_NEAS.exeSoundcrd.exeSoundcrd.exe

pid	Process
1968	65db97bc471b2c790aaabb6f4501d8b0_NEAS.exe
2204	Soundcrd.exe
2804	Soundcrd.exe

Suspicious use of WriteProcessMemory 25 IoCs

Processes:

65db97bc471b2c790aaabb6f4501d8b0_NEAS.execmd.exeSoundcrd.exe

description	pid	Process	procid_target
PID 1968 wrote to memory of 3140	1968	65db97bc471b2c790aaabb6f4501d8b0_NEAS.exe	83
PID 1968 wrote to memory of 3140	1968	65db97bc471b2c790aaabb6f4501d8b0_NEAS.exe	83
PID 1968 wrote to memory of 3140	1968	65db97bc471b2c790aaabb6f4501d8b0_NEAS.exe	83
PID 3140 wrote to memory of 4268	3140	cmd.exe	86
PID 3140 wrote to memory of 4268	3140	cmd.exe	86
PID 3140 wrote to memory of 4268	3140	cmd.exe	86
PID 1968 wrote to memory of 2204	1968	65db97bc471b2c790aaabb6f4501d8b0_NEAS.exe	87
PID 1968 wrote to memory of 2204	1968	65db97bc471b2c790aaabb6f4501d8b0_NEAS.exe	87
PID 1968 wrote to memory of 2204	1968	65db97bc471b2c790aaabb6f4501d8b0_NEAS.exe	87
PID 2204 wrote to memory of 4896	2204	Soundcrd.exe	89
PID 2204 wrote to memory of 4896	2204	Soundcrd.exe	89
PID 2204 wrote to memory of 4896	2204	Soundcrd.exe	89
PID 2204 wrote to memory of 4896	2204	Soundcrd.exe	89
PID 2204 wrote to memory of 4896	2204	Soundcrd.exe	89
PID 2204 wrote to memory of 4896	2204	Soundcrd.exe	89
PID 2204 wrote to memory of 4896	2204	Soundcrd.exe	89
PID 2204 wrote to memory of 4896	2204	Soundcrd.exe	89
PID 2204 wrote to memory of 2804	2204	Soundcrd.exe	90
PID 2204 wrote to memory of 2804	2204	Soundcrd.exe	90
PID 2204 wrote to memory of 2804	2204	Soundcrd.exe	90
PID 2204 wrote to memory of 2804	2204	Soundcrd.exe	90
PID 2204 wrote to memory of 2804	2204	Soundcrd.exe	90
PID 2204 wrote to memory of 2804	2204	Soundcrd.exe	90
PID 2204 wrote to memory of 2804	2204	Soundcrd.exe	90
PID 2204 wrote to memory of 2804	2204	Soundcrd.exe	90

C:\Users\Admin\AppData\Local\Temp\65db97bc471b2c790aaabb6f4501d8b0_NEAS.exe
"C:\Users\Admin\AppData\Local\Temp\65db97bc471b2c790aaabb6f4501d8b0_NEAS.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1968
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\yKJED.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3140
- - 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
    PID:4268
- C:\Users\Admin\AppData\Roaming\Soundcrd.exe
  "C:\Users\Admin\AppData\Roaming\Soundcrd.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2204
- - C:\Users\Admin\AppData\Roaming\Soundcrd.exe
    C:\Users\Admin\AppData\Roaming\Soundcrd.exe
    3⤵
    - Checks BIOS information in registry
    - Executes dropped EXE
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious use of AdjustPrivilegeToken
    PID:4896
- - C:\Users\Admin\AppData\Roaming\Soundcrd.exe
    C:\Users\Admin\AppData\Roaming\Soundcrd.exe
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2804

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