Stego Picoctf

Description Download this image and find the flag. Image

Hints We know the end of the message will be $t3go

Seeing how this challenge provides an image and is titled $t3go i.e Steganography, it’s pretty obvious how we would go about this.

To put the tools I used into a list, in this challenge I used strings, exiftool, and zsteg.

The first utility I used was strings with grep picoCTF to check if the flag is hidden as text inside the file. NO LUCK :<

I then tried using exiftool to see if the flag is hidden as a metadata. Again NO LUCK!

Finally, I used zteg; which is a tool created by the _zed-0xff_. Just like the other Steganography tools it detects hidden data inside PND and BMP.

Nonetheless, I typed zsteg pico.flag.png and the flag appeared.

Flag: picoCTF{7h3r3_15_n0_5p00n_a1062667}