My Blog

And this is my blog. When I do occasionally get off of my ass to write something, it's typically very technical and related to something that I've been working on. I have a basic tagging system, but haven't been bothered to write any sort of statistical rankings, so here's a few cherry-picked ones: tutorial, writeup, programming, and security.

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BackdoorCTF 2017: FUNSIGNALS

Posted on Sat, 24 Sep 2017.

"funsignals" was a 250 point binary exploitation challenge with 58 solves. The challenge itself was a very trivial example of sigreturn-oriented programming.

Sigreturn-oriented programming is a means of getting values into certain registers without having to use ROP gadgets that pop values from the stack. It's a technique that relies on how UNIX-like operating systems impl... (read on)

Understand Game Hacking in One Post

Posted on Tue, 5 Sep 2017.

At a first glance, it might seem that game cheats like AimTux are something that could only be conjured by the most talented of reverse engineers. That was at least my initial view on it, especially since I always saw these game hackers using outlandish terms that I hadn't heard in over a year of playing in CTF's. Don't be fo... (read on)

Analyzing Executable Size, part 0 - A Small, Proof-of-Concept Loader

Posted on Mon, 31 Jul 2017.

It seems that static linking is back in style, or at least popular among all the hip new programming languages of today. I don't have anything against statically linked binaries, nor do I have a problem with larger executables, but I've noticed that the acceptable size for an executable is a lot larger now than it was a few years ago; that is, the new kids on the block have signi... (read on)

Making Your Own Music Player: A Gentle Introduction to Audio Programming

Posted on Sat, 15 Jul 2017.

To start off, I'd like to say that I know very little about audio programming and digital audio in general. I've never formally studied signal processing, and hell, I haven't even started high school physics yet. This post merely documents what I've learned while trying to get sound working in my game, because there aren't really any other learning resources about this out there.... (read on)

Reverse Engineering Babby's First Archive Format

Posted on Thu, 2 Mar 2017.

About two months have passed since the first release of Nekopack - a tool I wrote for extracting game data from Nekopara's XP3 archives. While the process wasn't an amazing reverse-engineering war story that will keep you on the edge of your seat, I feel it deserves a small blog post explaining how I did it. Additionally, there's no real documentation on the XP3 format as far as ... (read on)