DFU Binary Extractor - Firmware Liberation Tool

A Python tool for extracting raw firmware binaries from DFU (Device Firmware Update) containers, optimized for reverse engineering with Ghidra. Perfect for analyzing Flipper Zero and other embedded device firmware.

🚀 Features

DFU Format Support: Handles both standard DFU and DfuSe (ST Microelectronics) formats Multi-Target Extraction: Automatically extracts all firmware targets from DfuSe files Ghidra-Ready: Outputs raw binaries ready for import into Ghidra or other RE tools

📋 Requirements

No external dependencies (uses only Python standard library)

💻 Usage

Extract firmware from DFU file:

python dfu-bin-extractor.py firmware.dfu

Specify custom output prefix

python dfu-bin-extractor.py firmware.dfu -o extracted_firmware

Show DFU file information without extraction

python dfu-bin-extractor.py firmware.dfu -i

Command Line Options positional arguments: input Input DFU file

optional arguments: -h, --help Show help message and exit -o OUTPUT, --output OUTPUT Output file prefix (default: input filename without extension) -i, --info Show DFU file information without extracting

🔍 Ghidra Integration

After extracting your firmware:

Create New Project: File → New Project → Non-Shared Project Import Binary: File → Import File → Select your .bin file Configure Import:

Format: Raw Binary Language: ARM Cortex (for STM32) or appropriate architecture (Flipper Zero use little endian) Base Address: Use the address shown by the extractor (e.g., 0x08000000)

Analyze: Analysis → Auto Analyze → Select all analyzers → Analyze

🎯 Use Cases

Flipper Zero Development: Extract and analyze Flipper Zero firmware updates

Research: Reverse engineer closed source firmware