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## Throwback to Defcon CTF Finals

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Just was thinkng back to a couple months ago when we competed in Defcon CTF Finals 2020.

## CTF and hacker content

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Burnout can happen. I found myself losing motivation a lot when all I did was push myself to work. Here’s some content that helps me relax while also re-motivating myself.

## CSAW Quals 2020 not-malware

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This is the next reversing challenge from CSAW Quals 2020 (first two are here).

## CSAW Quals 2020 baby-mult & ezbreezy

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I didn’t play CSAW Quals with RPISEC but thought I’d take a look at the reversing challenges afterwards to practice using Binary Ninja. I have a commercial license… so I should use it, right?

## TSGCTF2020 Reverse-ing

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Even though this is a reversing challenge, I thought I’d try to do the least amount of work and use Angr. Because this was labeled as an easy challenge, writing the angr solve script was also easy.

## TSGCTF2020 Beginner’s Crypto

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• Solved after the CTF ended :(
• I needed to see this post sooner…
• One of the answers includes an arithmetic version of left and right shift.
• I need to practice more crypto…

## Installing Arch

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A little while ago, after I passed my candidacy exam, I had a small burst of confidence. Because of this, I ended up trying to install Arch Linux for the first time since 2014 (when I was in my math undergrad program). Below is the steps I had to take to get there!

## PlaidCTF2020 reee

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I think this was one of the more easier reversing challenges from PlaidCTF. Regardless, I think it would still be beneficial for me to make this write-up as it is the first time I really used Ghidra instead of IDA on a task.

## Candidacy?

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Did I say I passed my Candidacy Exam? ..well, I passed my Candidacy Exam.

## Mov is making me crazy

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MOV* (Intel Sytnax) has been driving me crazy for a little bit…

## AUCTF2020 Sora

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This was another simple reverse engineering task. It can also be found on the CTF hosts website linked in the last post). Lucky for me, I have been trying to learn and incorporate angr more into my workflow.

## AUCTF2020 Miyazaki Trivia

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I participated in AUCTF 2020, which was hosted by Auburn University Ethical Hacking Club (AUECH). It was designed to be friendly towards new CTFers so I thought I’d take a crack at it over the weekend as part of a smooth transition. I made a team (something to do with coffee) of one and tried some challenges.

## Playing CTFs Again

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It has really been a while since I have played in a CTF seriously. Really, since starting graduate school, I feel like I have been playing “catch-up” (for various reasons). But, having become much more comfortable and confident in my ability to conduct research and because of the current stay-at-home situation due to COVID-19, I have decided to spend some weekends playing (or reviewing) CTFs.

## AFL Basics - 2

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This is a short post that serves as the extension of the previous fuzzing post.

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## What is fuzzing?

Simply put, fuzzing is a technique for testing programs with randomly generated input. This randomization helps us find bugs by providing potentially invalid and corner-case inputs for the target program.