.. /OfflineScannerShell.exe

Star

Paths:

• C:\Program Files\Windows Defender\Offline\OfflineScannerShell.exe

Acknowledgements:

• Elliot Killick (@elliotkillick)

Detections:

• Sigma: https://github.com/SigmaHQ/sigma/blob/bea6f18d350d9c9fdc067f93dde0e9b11cc22dc2/rules/windows/process_creation/proc_creation_win_lolbas_offlinescannershell.yml
• IOC: OfflineScannerShell.exe should not be run on a normal workstation

Execute

1. Execute mpclient.dll library in the current working directory

   OfflineScannerShell

   Use case

   Can be used to evade defensive countermeasures or to hide as a persistence mechanism

   Privileges required

   Administrator

   Operating systems

   Windows 10, Windows 11

   ATT&CK® technique

   T1218

   Tags

   Execute: DLL

   This LOLBAS executes Dynamic-Link Libraries (DLLs).