Source Simple Manual Map Injector — Handle and Thread Hijacking Logic

[byte_corvus]

Spent some time digging into this manual map injector today. It uses a fairly straightforward approach to handle and thread hijacking, which is a decent starting point if you are looking to understand how to bypass basic kernel callbacks without relying on the standard CreateRemoteThread or OpenProcess APIs.

Technical breakdown of the implementation:

1. Handle Hijacking: Duplicates existing handles from csrss.exe, effectively masking the origin of the access.
2. Thread Hijacking: Rather than spawning a new thread, it hooks into an existing waiting thread.
3. Process Enumeration: Uses NtQuerySystemInformation to iterate through processes.
4. Full PE Loader: Includes shellcode support for relocations, import resolution, TLS callbacks, and entry point execution.
5. Cleanup: Post-injection, it handles section protection fixups and wipes the header plus the shellcode to minimize the footprint.

Spoiler: Notes on usage

Usage instructions are documented inside core.cpp. The author explicitly warns that this is geared towards general-purpose injection into targets like notepad.exe or obs64.exe. Do not mistake this for a production-ready bypass for hardened anti-cheat systems—it lacks the necessary stealth for Vanguard or EAC level protection. You will get flagged instantly if you attempt to use this as-is in a competitive title.

I have seen similar concepts floating around, but this implementation is clean enough for educational purposes. It is a solid logic set if you want to experiment with manual mapping without dealing with the bloat of larger frameworks.

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Has anyone tested this against a custom driver or a lighter user-mode protection layer yet?