Next year I started to prepare to CTF much yearlier - as only details of upcoming CTF had become known %)

First of all I wrote my own ESP dissection software, later named ESP32knife.

Also I analyzed a set of compiled with ESP-IDF projects to extract symbol/function’s signatures.

This saved me a lot of time and allowed…

take first place, getting first blood in all tasks %))

As usually I did all task by harder way then expected - just compare my and athour’s writeups:

• CTF NNC2020, walkthrough by Anvol, video, slides
• Write-ups by VVS

Also I created ESP32 reversing repository to keep all found ESP32 reversing related stuff.

Thanks for prizes (especially red badge %):

and looking forward for the NNC 2021 CTF %)