Tags: excel forensics 

Rating:

WARNING: I was totally wrong in this and didn't even get the flag. It's still good info though.

https://github.com/burlingpwn/writeups/tree/master/EKOPARTY-CTF-2016/Forensics/Certified%20Excel%20H...

Original writeup (https://github.com/burlingpwn/writeups/tree/master/EKOPARTY-CTF-2016/Reversing/Back%20again).