Writeup for the 2018 Square CTF (https://2018.squarectf.com/)
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README.md

SquareCTF 2018 Writeup

Enclosed is my writeup for the 2018 Square CTF (https://squarectf.com/2018/index.html). Overall, the competition was a lot of fun. I worked on the entire CTF solo and was able to solve each of the ten problems. Had I spent more time immediately after each problem was released I might have placed higher, but as-is I managed > 9000 points on eight of the ten problems. My general strategy was to rely on custom solutions, and only in a couple cases did I resort to using a stock library to solve each challenge. As I write this, I'm sitting in 5th place with a day of the competition to go. I'll likely slip down as more solvers of the last few problems come in, but overall it was a good time.

Update: I ended up sixth due to some late C10 submissions.

Scoring

I played under the team name 'ion' and scored as follows:

SquareCTF Team 'ion'

The final competition results can be found here.

Problems

Easter Eggs

The "gates of hell" flag flag-526f64696e0000666 is ASCII for Rodin (who created a "gates of hell" sculpture) and 666 ("the number of the beast", also included in the challenge).