darkcomet | a37ac7f3d02f5d8b616ce794f064257022199150ed96319d8ff1a8ef7d29ad78

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	Ej2fnXedCum.exe

Executes dropped EXE 2 IoCs

pid	Process
2172	Ej2fnXedCum.exe
2860	server.exe

Loads dropped DLL 2 IoCs

pid	Process
2344	a37ac7f3d02f5d8b616ce794f064257022199150ed96319d8ff1a8ef7d29ad78N.exe
2172	Ej2fnXedCum.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-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\server = "C:\\Windows\\system32\\Dosya\\server.exe"	Ej2fnXedCum.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Dosya\	Ej2fnXedCum.exe
File created	C:\Windows\SysWOW64\Dosya\server.exe	Ej2fnXedCum.exe
File opened for modification	C:\Windows\SysWOW64\Dosya\server.exe	Ej2fnXedCum.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2344 set thread context of 2172	2344	a37ac7f3d02f5d8b616ce794f064257022199150ed96319d8ff1a8ef7d29ad78N.exe	29
PID 2172 set thread context of 2880	2172	Ej2fnXedCum.exe	30

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 3 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	Ej2fnXedCum.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	server.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a37ac7f3d02f5d8b616ce794f064257022199150ed96319d8ff1a8ef7d29ad78N.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	Ej2fnXedCum.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	Ej2fnXedCum.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	Ej2fnXedCum.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	Ej2fnXedCum.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	Ej2fnXedCum.exe

Suspicious use of AdjustPrivilegeToken 23 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2172	Ej2fnXedCum.exe
Token: SeSecurityPrivilege	2172	Ej2fnXedCum.exe
Token: SeTakeOwnershipPrivilege	2172	Ej2fnXedCum.exe
Token: SeLoadDriverPrivilege	2172	Ej2fnXedCum.exe
Token: SeSystemProfilePrivilege	2172	Ej2fnXedCum.exe
Token: SeSystemtimePrivilege	2172	Ej2fnXedCum.exe
Token: SeProfSingleProcessPrivilege	2172	Ej2fnXedCum.exe
Token: SeIncBasePriorityPrivilege	2172	Ej2fnXedCum.exe
Token: SeCreatePagefilePrivilege	2172	Ej2fnXedCum.exe
Token: SeBackupPrivilege	2172	Ej2fnXedCum.exe
Token: SeRestorePrivilege	2172	Ej2fnXedCum.exe
Token: SeShutdownPrivilege	2172	Ej2fnXedCum.exe
Token: SeDebugPrivilege	2172	Ej2fnXedCum.exe
Token: SeSystemEnvironmentPrivilege	2172	Ej2fnXedCum.exe
Token: SeChangeNotifyPrivilege	2172	Ej2fnXedCum.exe
Token: SeRemoteShutdownPrivilege	2172	Ej2fnXedCum.exe
Token: SeUndockPrivilege	2172	Ej2fnXedCum.exe
Token: SeManageVolumePrivilege	2172	Ej2fnXedCum.exe
Token: SeImpersonatePrivilege	2172	Ej2fnXedCum.exe
Token: SeCreateGlobalPrivilege	2172	Ej2fnXedCum.exe
Token: 33	2172	Ej2fnXedCum.exe
Token: 34	2172	Ej2fnXedCum.exe
Token: 35	2172	Ej2fnXedCum.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2344 wrote to memory of 2172	2344	a37ac7f3d02f5d8b616ce794f064257022199150ed96319d8ff1a8ef7d29ad78N.exe	29
PID 2344 wrote to memory of 2172	2344	a37ac7f3d02f5d8b616ce794f064257022199150ed96319d8ff1a8ef7d29ad78N.exe	29
PID 2344 wrote to memory of 2172	2344	a37ac7f3d02f5d8b616ce794f064257022199150ed96319d8ff1a8ef7d29ad78N.exe	29
PID 2344 wrote to memory of 2172	2344	a37ac7f3d02f5d8b616ce794f064257022199150ed96319d8ff1a8ef7d29ad78N.exe	29
PID 2344 wrote to memory of 2172	2344	a37ac7f3d02f5d8b616ce794f064257022199150ed96319d8ff1a8ef7d29ad78N.exe	29
PID 2344 wrote to memory of 2172	2344	a37ac7f3d02f5d8b616ce794f064257022199150ed96319d8ff1a8ef7d29ad78N.exe	29
PID 2344 wrote to memory of 2172	2344	a37ac7f3d02f5d8b616ce794f064257022199150ed96319d8ff1a8ef7d29ad78N.exe	29
PID 2344 wrote to memory of 2172	2344	a37ac7f3d02f5d8b616ce794f064257022199150ed96319d8ff1a8ef7d29ad78N.exe	29
PID 2344 wrote to memory of 2172	2344	a37ac7f3d02f5d8b616ce794f064257022199150ed96319d8ff1a8ef7d29ad78N.exe	29
PID 2344 wrote to memory of 2172	2344	a37ac7f3d02f5d8b616ce794f064257022199150ed96319d8ff1a8ef7d29ad78N.exe	29
PID 2344 wrote to memory of 2172	2344	a37ac7f3d02f5d8b616ce794f064257022199150ed96319d8ff1a8ef7d29ad78N.exe	29
PID 2344 wrote to memory of 2172	2344	a37ac7f3d02f5d8b616ce794f064257022199150ed96319d8ff1a8ef7d29ad78N.exe	29
PID 2344 wrote to memory of 2172	2344	a37ac7f3d02f5d8b616ce794f064257022199150ed96319d8ff1a8ef7d29ad78N.exe	29
PID 2172 wrote to memory of 2880	2172	Ej2fnXedCum.exe	30
PID 2172 wrote to memory of 2880	2172	Ej2fnXedCum.exe	30
PID 2172 wrote to memory of 2880	2172	Ej2fnXedCum.exe	30
PID 2172 wrote to memory of 2880	2172	Ej2fnXedCum.exe	30
PID 2172 wrote to memory of 2880	2172	Ej2fnXedCum.exe	30
PID 2172 wrote to memory of 2880	2172	Ej2fnXedCum.exe	30
PID 2172 wrote to memory of 2860	2172	Ej2fnXedCum.exe	32
PID 2172 wrote to memory of 2860	2172	Ej2fnXedCum.exe	32
PID 2172 wrote to memory of 2860	2172	Ej2fnXedCum.exe	32
PID 2172 wrote to memory of 2860	2172	Ej2fnXedCum.exe	32

C:\Users\Admin\AppData\Local\Temp\a37ac7f3d02f5d8b616ce794f064257022199150ed96319d8ff1a8ef7d29ad78N.exe
"C:\Users\Admin\AppData\Local\Temp\a37ac7f3d02f5d8b616ce794f064257022199150ed96319d8ff1a8ef7d29ad78N.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2344
- C:\Users\Admin\AppData\Local\Temp\Ej2fnXedCum.exe
  C:\Users\Admin\AppData\Local\Temp\Ej2fnXedCum.exe
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - Drops file in System32 directory
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2172
- - C:\Windows\SysWOW64\explorer.exe
    "C:\Windows\SysWOW64\explorer.exe"
    3⤵
    PID:2880
- - C:\Windows\SysWOW64\Dosya\server.exe
    "C:\Windows\system32\Dosya\server.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2860

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

3

System Information Discovery

4

System Location Discovery

T1614

System Language Discovery