FireWalker Instructions

This repo contains a simple library which can be used to add FireWalker hook bypass capabilities to existing code; the FireWalker concept is described on the MDSec blog at https://www.mdsec.co.uk/2020/08/firewalker-a-new-approach-to-generically-bypass-user-space-edr-hooking/.

To use the library just #include the FireWalker.h source file within existing C++ code and wrap API calls which may be hooked with FIREWALK, e.g.:

    if (!FIREWALK(QueueUserAPC((PAPCFUNC)lpvRemote, hRemoteThread, NULL)))
    {
        printf("QueueUserAPC failed\n");
        return 1;
    }

At present FireWalker only supports 32-bit code with 32-bit hooks; x64 and WoW64 support may be added if the concept is popular.