PicoCTF2018 - Forensics - now you don't

PicoCTF2018 - Forensics - now you don't

Objective:
We heard that there is something hidden in this picture [1] . Can you find it?

Hints:
(1) There is an old saying: if you want to hide the treasure, put it in plain sight. Then no one will see it. (2) Is it really all one shade of red?

Solution:

I used irfanview to get through this one.

As the hint suggests, eventhough it looks like its just one solid color there is another color present.

Load up infranview and you see just red

if you go to image and replace color you can choose to replace a specific color with anohter I chose to replace it with black

Original image:

Modified Image:

picoCTF{n0w_y0u_533_m3}