iHack2013 Forensic Challenge #11 WriteUp - Lets Cool Your Mind with Cartoon First :D

In this challenge, we are given this clue and a file.

Running file on the file given tells us this is a video file.

Some weird noise that resembles morse code is noticeable at 02:48 mark. We rip the audio out from the ASF file and load it in Audacity, and we see something in the audio stream.

Snip the part that we want and this is what we get:

Morse code! Decoding it gives this:

SKUCSKUCACGTZYLRGMUDXUREVUREXUREXUREVUREOFZKNLRGM

Based on the clue, we guess it's encoded with Caesarian cipher (ROT13, "the 13th time"), with 6 alphabet shifts (6am).

Decoded:

MEOWMEOWUWANTSFLAGOXROLYPOLYROLYROLYPOLYIZTEHFLAG

Flag: ROLYPOLYROLYROLYPOLY