Drone Firmware Analysis

# Acquisition methods:
# 1. Official firmware downloads (DJI Assistant, etc.)
# 2. Capture OTA updates (MITM)
# 3. Dump from hardware (JTAG/SWD/UART)
# 4. SD card update files

# DJI firmware extraction
# Use dji-firmware-tools
git clone https://github.com/o-gs/dji-firmware-tools
pip install pycryptodome

# Extract modules from DJI firmware
python dji_mvfc_fwpak.py -u -i firmware.bin

# Decrypt DJI firmware (if keys known)
python dji_imah_fwsig.py -u -i module.sig

# ArduPilot/PX4 - Usually open source
# Analyze parameters and build options

# Look for in firmware:

# 1. Geofence database
strings firmware.bin | grep -i airport
# DJI stores NFZ (No-Fly Zone) data

# 2. Encryption keys
grep -boa "KEY|AES|RSA" firmware.bin

# 3. Authentication mechanisms
# - Pairing protocols
# - License validation
# - Activation checks

# 4. Flight limits
# - Altitude restrictions
# - Speed limits
# - Range limits

# 5. Debug interfaces
# - UART console
# - Hidden commands
# - Engineering modes

# Load in Ghidra for full analysis
# ARM Cortex-M common for flight controllers