Writeup for Pwnable.tw #3
On our last hackathon, Malfunction, Scotch and me tried to beat several CTFs. This article sums up the results of challenge #3 on pwnable.tw. The basic settings are: A calculator service runs on chall.pwnable.tw, port […]
Codebuild, Gitlab and Submodules
by christian
We like the serverless components of Amazons AWS. One of its interesting features is a build environment which consists of CodeCommit, CodeBuild and CodePipeline. CodeCommit allows you to create Git repositories, CodeBuild executes the build […]
Genesis2Amiga Gamepad Adapter
by christian
We love retro computing. Especially the Commodore Amiga is great device with lots of games. Each of them can be enjoyed on an emulator, but I prefer real hardware. Unfortunatly, 30 years old joysticks tend […]
Xtext and Domain Specific Languages
by christian
Yesterday, we gave a presentation at Cologne Intelligence about domain specific languages (DSL) in software projects. The basic idea is: Instead of writing the whole Java source code manually, parts of the project are implemented […]
Buying an Amiga in 2017
by christian
We (like many others) grew up with Commodore personal computers and still love their devices. Especially the Amiga with its advanced graphics capatibilities was ahead of its time. Even nowadays, it is still fun to […]
Sega Mega Drive 2 Region Free Mod
by christian
Introduction I like playing retro games on my old consoles. Unfortunatly, some of them have region locks. E.g. my Mega Drive 2 is locked to 50Hz and can not switch to 60Hz. This leads to […]
Microsoft x64 Calling Convention with FASM
by christian
Introduction At the moment, I am working on a new Hyperion version with 64 bit support. The decryption stub of Hyperion is written using the flat assembler for 32 bit platforms. Therefore, the whole code […]
Atari (Lightgun) Homebrews
by christian
Introduction My first gaming console was an Atari 2600 Junior. Although it is not very powerful, i loved the device. When i became older, it was replaced by an Nintendo Entertainment System, SNES, etc. Decades […]
Game Boy Development
by christian
When studying at the university of Oldenburg, i did a student project regarding the Nintendo Game Boy from 1989. We tried to develop a homebrew cartridge and write come code using C. The project was […]
LoadLibrary and the PE Loader
by christian
I recently stumbled upon an interesting behaviour of the PE loader. Before releasing a new Hyperion version, I usually test it with several executables on different Windows platforms. In my old XP VM, everything went […]