The crackme is a very simple Cocoa app with an input field and a button.Īnd if we input some random data and press Activate we get the following alert: Let’s start by checking what our target looks like and what should be our goal. It is a fun target written by a very young already showing his great talent (I think he was 12 or 14 at the time). Today’s target is CrackMe_nr1_qwertyoruiop.app.
You can click the pictures to see the full size version. It is mostly targeted to newcomers to reverse engineering and macOS. I couldn’t find any public write-up about it so I decided to write one. I had a look when he originally sent it but got distracted with something else at the time and never finished it. So I decided to revisit some unfinished business with qwertyoruiop’s crackme. I have spent the past two years or so mostly writing C code (secure C is more like an asymptote but that is why it is a fun challenge) and barely doing any serious reverse engineering and security research. I was bored this weekend and decided to take some rust out of my reversing skills before they disappear for good.
