darkcomet | 2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.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-1-5-21-250031470-1197856012-2659781506-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Windupdt\\winupdate.exe"	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1648 set thread context of 1784	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe	89

System Location Discovery: System Language Discovery 1 TTPs 2 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	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.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	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.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	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{AA34DCA9-A4FA-68C1-AB09-DAF2AB09DAF2}	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{AA34DCA9-A4FA-68C1-AB09-DAF2AB09DAF2}\ = "{0000031A-0000-0000-C000-000000000046}"	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe

NTFS ADS 2 IoCs

description	ioc	Process
File created	C:\ProgramData\TEMP:5F468ABB	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
File opened for modification	C:\ProgramData\TEMP:5F468ABB	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe

Suspicious use of AdjustPrivilegeToken 26 IoCs

description	pid	Process
Token: 33	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Token: SeIncBasePriorityPrivilege	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Token: SeIncreaseQuotaPrivilege	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Token: SeSecurityPrivilege	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Token: SeTakeOwnershipPrivilege	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Token: SeLoadDriverPrivilege	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Token: SeSystemProfilePrivilege	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Token: SeSystemtimePrivilege	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Token: SeProfSingleProcessPrivilege	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Token: SeIncBasePriorityPrivilege	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Token: SeCreatePagefilePrivilege	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Token: SeBackupPrivilege	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Token: SeRestorePrivilege	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Token: SeShutdownPrivilege	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Token: SeDebugPrivilege	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Token: SeSystemEnvironmentPrivilege	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Token: SeChangeNotifyPrivilege	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Token: SeRemoteShutdownPrivilege	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Token: SeUndockPrivilege	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Token: SeManageVolumePrivilege	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Token: SeImpersonatePrivilege	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Token: SeCreateGlobalPrivilege	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Token: 33	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Token: 34	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Token: 35	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
Token: 36	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1648 wrote to memory of 1784	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe	89
PID 1648 wrote to memory of 1784	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe	89
PID 1648 wrote to memory of 1784	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe	89
PID 1648 wrote to memory of 1784	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe	89
PID 1648 wrote to memory of 1784	1648	2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe	89

C:\Users\Admin\AppData\Local\Temp\2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe
"C:\Users\Admin\AppData\Local\Temp\2a7e321b570eb2d1da85e69873cef59a8da503853450a3301c0486ed1690b58d.exe"
1⤵
- Modifies WinLogon for persistence
- Checks BIOS information in registry
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Enumerates system info in registry
- Modifies registry class
- NTFS ADS
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1648
- C:\Windows\SysWOW64\explorer.exe
  "C:\Windows\SysWOW64\explorer.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1784

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

3

System Location Discovery

T1614

System Language Discovery