EasyAF - Crackme Writeup

This crackme has been provided by crackmes.one.
Get it here: Link

Introduction

For all my solutions, I will use radare2: a fantastic terminal user interface reversing tool that amazes me daily on its immense potential. So when I use a :> it is a radare2 shell command (from Visual modes you can get to this via the : key just like in vim). When I use ❱ it is referring to a normal shell command. With that out of the way let's get to the meat of it!

Solution

Reading the dissassembly of this code was horrendous lol, killed my eyes to have to read the extraordinarily large function call lines etc, and for a minite it was even slightly intimidating honestly. Getting to the actual program meat though was simple. Didn't have to debug or anything, hardly had to read much assembly either. Found a string "pass" and found that it gets stored into a string then some other things happen but in the end of the block, the input string is tested against "pass" and we get our win.

❱ ./easyAF
Welldone!

Well that wasnt too hard, could have done that even simpler with a strings or similar. But we got it! We got the flag and solution.

Closing

Hope you enjoyed this writeup, it isn't much partly because the crackme itself wasn't much but atleast we did it! Thanks for reading and have a blessed day! Shado out.