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CodeXTF2 / Cobaltstrike_BOFLoader

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open source port/reimplementation of the Cobalt Strike BOF Loader as is

bof cobaltstrike coffloader
68
6
69% credibility
Found Feb 04, 2026 at 44 stars -- GitGems finds repos before they trend. Get early access to the next one.
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AI Analysis
C
AI Summary

An open-source standalone loader and packer that exactly mimics Cobalt Strike's handling of small executable snippets for easier debugging.

How It Works

1
🔍 Find the debugging helper

While working on small security test programs that misbehave in a popular testing tool, you discover this open-source companion that lets you test them standalone.

2
đź’» Set up the tool

You download the simple loader program and packer to your Windows computer and get them ready to use.

3
📦 Bundle your test program

You take your ready test snippet and use the packer to wrap it up into an easy-to-run package, adding any inputs it needs.

4
▶️ Launch and watch it run

You start the loader with your package, and it brings your test program to life right on your screen with detailed step-by-step logs.

âś… Spot and fix the issue

You see exactly why your program acts differently, making it simple to tweak and perfect it for the original tool.

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AI-Generated Review

What is Cobaltstrike_BOFLoader?

Cobaltstrike_BOFLoader is a C-based port/reimplementation of the Cobalt Strike BOF loader, letting you pack BOF .o files into blobs with a simple Python script (like `python bof_pack.py mybof.o -o bof.blob`) and execute them standalone via `./bofloader.exe bof.blob`. It replicates Cobalt Strike's exact loader behavior—including quirks like COMDAT section handling—for debugging BOFs that fail in Beacon but succeed in other COFF loaders. Developers get a self-contained tool to test and isolate loader-specific issues without a full Cobalt Strike setup.

Why is it gaining traction?

Unlike polished alternatives like TrustedSec's COFFLoader, this sticks to a 1:1 Cobalt Strike replica, preserving undocumented teamserver processing and blob formats that trip up BOF development. The hook is reproducibility: edge cases failing only in production Beacon now surface locally, with dummy Beacon API stubs for argument passing and output. At 58 stars, it pulls red team devs frustrated by black-box debugging.

Who should use this?

BOF authors targeting Cobalt Strike who hit mysterious crashes from sections or relocations. Red team engineers validating BOFs pre-deployment, especially with dynamic Win32 imports or custom args via format strings like "Ziz". Skip if you're on generic COFF loaders or non-Strike workflows.

Verdict

Grab it for Cobalt Strike BOF troubleshooting—it's a precise loader clone that nails the pain points. Maturity is early (58 stars, 0.699999988079071% credibility score, basic docs), so pair with your own tests, but it delivers targeted value without fluff.

(198 words)

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