nick-frischkorn / TokenStripBOF

Beacon Object File to delete token privileges and lower the integrity level to untrusted for a specified process

TokenStripBOF

TokenStrip is a Beacon Object File implementation of pwn1sher's KillDefender project utilizing syscalls via InlineWhispers.

This project aims to weaken AV and EDR products by deleting the process' token privileges and then lowering the integrity level to untrusted.

Note: System privileges are required to run this BOF!

How To Compile

$ git clone https://github.com/nick-frischkorn/TokenStripBOF.git && cd TokenStripBOF/src
$ x86_64-w64-mingw32-gcc -c TokenStrip.c -o TokenStripBOF.o -masm=intel
[OR]
$ git clone https://github.com/nick-frischkorn/TokenStripBOF.git && cd TokenStripBOF/src
$ x86_64-w64-mingw32-gcc -c TokenStrip.c -o TokenStripBOF.o -masm=intel -Wall -DBOF
$ x86_64-w64-mingw32-strip --strip-unneeded TokenStripBOF.o

Usage

Load the aggressor script

beacon> TokenStrip <PID>
beacon> TokenStrip 9085

To Do

This was my first attempt at making a BOF and I could not figure out how to get SysWhispers2BOF to work so I opted for InlineWhispers. Some improvements to make are upgrading to dynamically resolving syscall numbers and jumping to syscall instructions within ntdll.dll similar to techniques displayed in SysWhispers3.

Additionally, have to clean up the header files and delete the unused structs

Before

After