Required reverse engineering a backdoor in an iot firmware.

Full writeup: [https://ctf.rip/write-ups/iot/firmware/wormcon-firm/#firm2](https://ctf.rip/write-ups/iot/firmware/wormcon-firm/#firm2)

Original writeup (https://ctf.rip/write-ups/iot/firmware/wormcon-firm/#firm2).