What Lies Within is a forensics puzzle worth 150 points.
The description of this puzzle:
There's something in the building. Can you retrieve the flag?
buildings.png is provided, which shows a picture of a building:
First, I tried using
exiftool and just looking around at the picture. This is likely a steganography challenge based on it being in the Forensics category and the puzzle being an image. Usually for steganography challenges, I start by simply trying a bunch of known decoders against it.
In this instance, I got a hit with
I should really sit down one day and make a list of decoders and what kinds of files they work on, and script something out to automate these easier challenges.