Significance of Reversing

Over the years, we hackers have been reversing stuff, thinking we understand how everything works and feel good about it. But, sometimes it feels like do we really understand what reversing means in mordern days? Anyways, here's a PNG, let's see if you can reverse your way out of this one.

Attachment: Reverseme.png

Solution

Downloaded the image and tried to open it, but imv came up with nothing, So as standard procedure, i opened it in neovim and found the following:

Reversed strings which looked like dynamically linked library paths, and the FLE at the end which was ELF reversed gave it away

This was a reversed ELF executable

A simple script for reversing it and we were golden

file = open("Reverseme.png", "rb")

data = file.read()

data = data[::-1]

data = data[1:]

file.close()

bin = open("Forward.elf", "wb")

bin.write(data)

bin.close()

Running the Forward.elf gave us:

Decrypted string: ACECTF{w3_74lk_4b0u7_r3v3r53}