HackINI 2018 : Some Writeups
Hello, HackINI (stands for Hack Initiation) is an event that is held once a year at the higher national school of computer science at Algiers, in a whole day, a CTF competition and workshops on various information security subdomains are held in parallel, this year, it was held on February 10th. The challenges of the CTF competition are mostly easy-medium, this post will contain some writeups on some of the tasks. Locked (Reverse Engineering): We are given a program that prompts us for a combination of keypresses. When we select a wrong combination of keys and press check, it displays "Wrong password" , and if we do it three times, the program exits Let's start reversing! first, let's identify the file, we could use Detect it Easy, or any other file identifier Looks like it's a .NET program, let's decompile it to check its code (I'll use dnSpy, a free .NET decompiler). Hmm, this function is called when we press the Chec