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Summary

YouMayPasser is an x64 implementation of Gargoyle (https://github.com/JLospinoso/gargoyle)

BLOG POST HERE: https://www.arashparsa.com/bypassing-pesieve-and-moneta-the-easiest-way-i-could-find/

It contains several parts.

  • Lockd: This is the main Gargoyle component
  • sRDI-Master: This has been slightly re worked to provide a free mechanism.
  • test.profile: This sample profile shows required options to work
  • ShellcodeRDI.py: This is the altered python generator with the new sRDI assembly

Stable PeSieve and Moneta Bypass and Clean Exits.

This gif demonstrates full functionality and stability of the code on Windows 10.

PESieve Bypassed

Stable Moneta Bypass

Moneta Bypassed

IOCs

Below are a list of current IOCs

  • The new sRDI assembly can of course by statically detected in memory.
  • The DLL loads are leveraged in order to obtain the required ropgadgets, these can all be monitored and alerted on
  • VEH Handlers constantly getting created and deleted not originating from disk (These get removed on sleep so it cannot be detected on sleep)
  • VEH Handlers getting created that aren't generated from disk
  • The SetThreadContext injection leveraged to spoof the start address is in itself suspicious as these calls are often only used by debuggers

I will fix none of these issues. This is nothing more than an x64 gargoyle POC to demonstrate how it can be leveraged to bypass PeSieve and Moneta.

shoutouts

  1. Ret address spoofing - Namaszo (https://www.unknowncheats.me/forum/anti-cheat-bypass/268039-x64-return-address-spoofing-source-explanation.html)
  2. Timer sleep - computerBeat (https://blat-blatnik.github.io/computerBear/making-accurate-sleep-function/)
  3. VEH Hooks - CheatEngine Forums https://www.cheatengine.org/forum/viewtopic.php?t=610689&sid=c329059fbe5c36ef296bce5ef72decfc