The Backdoor Factory (BDF) – Patch Binaries With Shellcode


The Backdoor Factory or BDF is a tool which enables you to patch binaries with shellcode and continue normal execution exactly as the executable binary would have in its’ pre-patched state.

The Backdoor Factory (BDF) - Patch Binaries With Shellcode


Some executables have built in protection, as such this tool will not work on all binaries. It is advisable that you test target binaries before deploying them to clients or using them in exercises.

There’s a couple of somewhat related tools you can also check out:

peinjector – MITM PE File Injector
PEiD – Detect PE Packers, Cryptors & Compilers

Features of Backdoor Factory

Overall BDF Features

The user can:

  • Provide custom shellcode.
  • Patch a directory of executables/dlls.
  • Select x32 or x64 binaries to patch only.
  • Include BDF is other python projects see pebin.py and elfbin.py

PE File Related Backdoor-Factory Features

  • Can find all codecaves in an EXE/DLL.
  • By default, clears the pointer to the PE certificate table, thereby unsigning a binary.
  • Can inject shellcode into code caves or into a new section.
  • Can find if a PE binary needs to run with elevated privileges.
  • When selecting code caves, you can use the following commands:
    • Jump (j), for code cave jumping
    • Single (s), for patching all your shellcode into one cave
    • Append (a), for creating a code cave
    • Ignore (i or q), nevermind, ignore this binary
  • Can ignore DLLs
  • Import Table Patching
  • AutoPatching (-m automtic)
  • Onionduke (-m onionduke)

ELF Files Backdoor Feature

Extends 1000 bytes (in bytes) to the TEXT SEGMENT and injects shellcode into that section of code.

Mach-O Files

Pre-Text Section patching and signature removal


The Backdoor Factory Usage

You can download Backdoor Factory here:

the-backdoor-factory-3.4.2.zip

Or read more here.

Posted in: Hacking Tools


Latest Posts:


APT-Hunter - Threat Hunting Tool via Windows Event Log APT-Hunter – Threat Hunting Tool via Windows Event Log
APT-Hunter is a threat hunting tool for windows event logs made from the perspective of the purple team mindset to provide detection for APT movements hidden in the sea of windows event logs.
GitLab Watchman - Audit Gitlab For Sensitive Data & Credentials GitLab Watchman – Audit Gitlab For Sensitive Data & Credentials
GitLab Watchman is an app that uses the GitLab API to audit GitLab for sensitive data and credentials exposed internally, this includes code, commits, wikis etc
GKE Auditor - Detect Google Kubernetes Engine Misconfigurations GKE Auditor – Detect Google Kubernetes Engine Misconfigurations
GKE Auditor is a Java-based tool to detect Google Kubernetes Engine misconfigurations, it aims to help security & dev teams streamline the configuration process
zANTI - Android Wireless Hacking Tool Free Download zANTI – Android Wireless Hacking Tool Free Download
zANTI is an Android Wireless Hacking Tool that functions as a mobile penetration testing toolkit that lets you assess the risk level of a network using mobile.
HELK - Open Source Threat Hunting Platform HELK – Open Source Threat Hunting Platform
The Hunting ELK or simply the HELK is an Open-Source Threat Hunting Platform with advanced analytics capabilities such as SQL declarative language, graphing etc
trape - OSINT Analysis Tool For People Tracking Trape – OSINT Analysis Tool For People Tracking
Trape is an OSINT analysis tool, which allows people to track and execute intelligent social engineering attacks in real-time.


Comments are closed.