picoCTF 2021 writeup - Information
'Information' is an easy forensic task. Before we take a look at this challenge, i want to clear things up in case you don't know what forensics means. What is forensics? In a CTF/Hacking context, forensics can include: file format analysis steganography memory dump analysis network packet capture analysis To explain be more precise: any challenge to examine and process a hidden piece of information out of static data files. Getting information When looking at the description, there already is a little hint. Files can always be changed in a secret way. We get to download a file called cat.jpg . The first and most obvious thing to do is to take a look at this image. When i first opened this image, i thought this challenge might be over already. Behind the cat is an open terminal and i somehow thought there will be the flag. Turns out, no. In my previous post, we changed the file extension of a php file to jpg. So a good practice is to confi...
