COFF Loader

This is a quick and dirty COFF loader (AKA Beacon Object Files). Currently can run un-modified BOF's so it can be used for testing without a CS agent running it. The only exception is that the injection related beacon compatibility functions are just empty.

The main goal is to provide a working example and maybe be useful to someone.

Parts

There are a few parts to it they are listed below.

• beacon_compatibility: This is the beacon internal functions so that you can load BOF files and run them.
• COFFLoader: This is the actual coff loader, and when built for nix just loads the 64 bit object file and parses it.
• test: This is the example "COFF" file, will build to the COFF file for you when make is called.
• beacon_generate: This is a helper script to build strings/arguments compatible with the beacon_compatibility functions.

Beacon Generate

This is used to generate arguments for the COFFLoader code, if the BOF takes arguments simply add the arguments with the type expected with this and generate the hex string for use.

Example usage here:

COFFLoader % python3 beacon_generate.py
Beacon Argument Generator
Beacon>help

Documented commands (type help <topic>):
========================================
addString  addWString  addint  addshort  exit  generate  help  reset

Beacon>addWString test
Beacon>addint 4
Beacon>generate
b'120000000a0000007400650073007400000004000000'
Beacon>reset
Beacon>addint 5
Beacon>generate
b'0400000005000000'
Beacon>exit

Running

An example of how to run a BOF is below.

COFFLoader64.exe go test64.out
COFFLoader64.exe go ..\CS-Situational-Awareness-BOF\SA\whoami\whoami.x64.o