Recon

This challenge is about a Tetris game and I have to find a secret hidden somewhere inside the game files. First thing, I download the files and looked around.

I opened a couple of icons to check for metadata but nothing interesting showed up. Before running the actual game, I wanted to try reading the .exe file with strings. It’s a command where you can extract readable strings from a binary which can sometimes reveal useful information like file paths, URLs, IP addresses, or passwords.

Finding the Flag

Let’s run it and search for something specific starting with thm{:

strings Tetrix.exe | grep thm{

Nothing came back. Maybe the flag had mixed or uppercase letters so I needed case insensitive search. Let’s try again with -i:

strings Tetrix.exe | grep -i thm{

Got it.

Flag: THM{I_CAN_READ_IT_ALL}