Category: Write-Ups

2020
Write-Ups

Kernel Blues, or Why x86 Is So Convoluted

PrefaceThis weekend I casually played a CTF hosted by UIUC, and spent most of my time on their kernel challenge. First I'd like to commend @ravi for such a well written kernel challenge, it was q

2019
Write-Ups0ctf

0ctf19 Finals

Hello so recently I have competed in 0ctf alongside a huge collab group of Perfect Blue, Sice Squad, Galhacktic Trendsenders, and RPISEC on team U+1F914. This was a pretty fun collab, and for the most

Write-UpsConfidenceCTF'19

Confidence CTF 2019

WatchmenSo first glance at this binary, I noticed that it is a windows binary (ewww!) so that was kinda annoying. I also took a quick glance at the code, I saw some sort of assembly instructions (did

Write-UpsUTCTF

UTCTF-19

Last weekend I competed at UTCTF with team dcua (or at least representing dcua, as this was only open to American university students, and up to 5 people). Wow. UT has it's own CTF now! Woot. Now

Write-UpsTAMUCTF

TAMUCTF 2019

I competed in TAMUCTF as part of team dcua. Because this was a week long competition, by the end of it, basically many teams tied in terms of score, but we managed to get all the challenges the fastes

2018
Write-UpsHXP CTF

HXP CTF Writeups

So I just competed in HXP CTF with team dcua. Our team ended up fourth, which was pretty nice stuff. There were a few fun challenges, including the wreckme2 challenge, which I will discuss later on.

Write-UpsASIS CTF

ASISCTF Finals 2018

So I competed ASIS CTF Finals 2018 as part of team dcua. It was a nice experience even though I personally was able to really tackle one problem: Light Fence. (I also helped with other problems, but t

Write-UpsCSAW 2018

CSAW Finals 2018 Writeups

Hey everyone! I came back from a long 36-hour CSAW ctf finals competition, competing as dcua. So I wrote a quick (long) reflection on what I thought about CSAW ctf. Here are some of the writeups that

Write-UpsHITCON CTF

HITCON CTF Writeups

Hello. So I just competed in the HITCON competition with UTDCSG. I was personally able to solve only two problems: abyss I and II. I was going to move to abyss III and solve that, but that required re

Write-UpsGoogle CTF

Google CTF Writeups

So I just competed in Google CTF. Unfortunately, I was only able to solve one problem within the competition, but I think this problem is a very interesting, and it is worth discussing about it! KeyGe