Forensics
Golly
It's a code of Golly rle file, when I run a code given I just have a alphabet table:
Run it and nothing else, I read a rle file document at here. And I know a "$" represents the end of each row and an optional "!" represents the end of the pattern. So I just copy the paragraph after !$$$$ and I got
Flag: sun{th1s_w0nt_last}
Open the file in HXD I saw something like a hint:
Hey! Mario said something about a hidden key. Hesaid this: F2I and A1S, and that it was in two pieces
Because this is 001 file so I use FTK Imager to open it. And I found an JPG image of Mario:
