Alessandro Gario

This is the writeup for another challenge from the VolgaCTF 2016 Quals; the task consists in analyzing a binary executable that encrypts files and find a way to recover the clear text from an encoded file. The article also includes a working implementation for a compatible encoder and decoder written in C++. [Read More]

This is a writeup for the Broken challenge from VolgaCTF 2016 Quals. The first part of the article will explain how to remove the anti-debugging protection and restore the opcodes that have been removed. The second part will make use of radare2 to patch the program and repair the logic of the locks used to synchronize the threads. [Read More]