Posted on Sat 22 December 2018 in binary reverse, IT, security
This is a writeup for the Endless Christmas challenge, md5 hash 866c92038d6e9fc47db4424f71f6167a (download binary). It appeared in the X-MAS CTF, and it's a Reverse challenge.
Using afl with Radare we can see there are calls to write and execve, both happening in main, a sign that this program creates (and …
Posted on Tue 13 February 2018 in binary reverse, brute force, python, programming, IT, security
I was to reverse a file for a challenge, MD5 hash 85c9feed0cb0f240a62b1e50d1ab0419.
The challenge was called mio cuggino, purposefully misspelled with two g letters. It asks for three numbers. The challenge led me to a brute force of the password with a Python script, learning how to interact with a …
Posted on Sat 13 January 2018 in binary reverse, IT, security