tags:firmwarecar_hackingiot original link: Recovering an ECU firmware using disassembler and branches newsletter link: exploits.club Weekly Newsletter 26
Exploits Club Summary:
A new post out of Quarkslab this week walks through an interesting challenge the team recently faced on a black box assessment while trying to dump the firmware. After your typicalÂ
binwalk failed, the team ended up digging deep into the internals of the FAT filesystem. They then whipped up a Python script to identify function prologues, which helped identify some valid firmware chunks. Iterating on this idea, they added some script improvements by analyzing branch instructions, allowing them to slowly put the clusters of valid ARM functions into the correct order and export it to a new binary, recovering most of the firmware.