.. /Pcwutl.dll

Star

Paths:

• c:\windows\system32\pcwutl.dll
• c:\windows\syswow64\pcwutl.dll

Resources:

• https://twitter.com/harr0ey/status/989617817849876488
• https://windows10dll.nirsoft.net/pcwutl_dll.html

Acknowledgements:

• Matt harr0ey (@harr0ey)

Detections:

• Analysis: https://redcanary.com/threat-detection-report/techniques/rundll32/
• Sigma: https://github.com/SigmaHQ/sigma/blob/62d4fd26b05f4d81973e7c8e80d7c1a0c6a29d0e/rules/windows/process_creation/proc_creation_win_rundll32_susp_activity.yml

Execute

1. Launch executable by calling the LaunchApplication function.

   rundll32.exe pcwutl.dll,LaunchApplication calc.exe

   Use case

   Launch an executable.

   Privileges required

   User

   Operating systems

   Windows 10, Windows 11

   ATT&CK® technique

   T1218.011