Psr.exe

Commands

1. ReconnaissanceUser T1113

   Can be used to take screenshots of the user environment

   psr.exe /start /output {PATH_ABSOLUTE:.zip} /sc 1 /gui 0

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

   os: since Windows 7 (client) / Windows 2008 R2

Detection

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

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