.. /Psr.exe

Star

Paths:

• c:\windows\system32\psr.exe
• c:\windows\syswow64\psr.exe

Resources:

• https://social.technet.microsoft.com/wiki/contents/articles/51722.windows-problem-steps-recorder-psr-quick-and-easy-documenting-of-your-steps-and-procedures.aspx

Acknowledgements:

• Leon Rodenko (@L3m0nada)

Detections:

• Sigma: https://github.com/SigmaHQ/sigma/blob/c04bef2fbbe8beff6c7620d5d7ea6872dbe7acba/rules/windows/process_creation/proc_creation_win_psr_capture_screenshots.yml
• IOC: psr.exe spawned
• IOC: suspicious activity when running with "/gui 0" flag

Reconnaissance

1. Record a user screen without creating a GUI. You should use "psr.exe /stop" to stop recording and create output file.

   psr.exe /start /output D:\test.zip /sc 1 /gui 0

   Use case

   Can be used to take screenshots of the user environment

   Privileges required

   User

   Operating systems

   since Windows 7 (client) / Windows 2008 R2

   ATT&CK® technique

   T1113