Too Long; Didn't Read
This time I'm tackling this beautiful crackme, the third of the series. To solve this we will use radare2’s macros and unicorn emulation. The crackme asks for a 4 digit password that the user needs to input one digit at the time. We can emulate the function that checks each digit testing every combination until we get the expected state at the end. Bruteforce powered by GEF and unicorn-engine is a great tool and GEF command makes our lives a lot easier.