Sunday, March 26, 2017

VolgaCTF 2017 Quals - VC (50)


This was a very quick one, instantly saw this coming with the low point score, two images and description:

There are files A.png and B.png. But where's the flag?



Primarily posting this to show off a feature in StegSolve.

After loading StegSolve, open up the first png, (File > Open > [choose A.png]).
Next go to Analyse > Image Combiner, and select B.png.
The first option XOR should instantly solve this challenge (for other algorithms, use the left and right arrow to preview them).

You may then save the result for later use : )