Category: Talks and Learning Resources
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Apr 11, 2024
Intro Talks 2024
Starting on the 25th of April, we will be holding introductory talks for the main categories of Capture the Flag. We meet on Thursdays at 7pm in the CS building 50.34, room -101. Please bring a laptop if possible.
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Dec 20, 2023
Talk: Frida Game Hacking
CTF challenges are usually well-behaved programs. But what do you do in more complex cases such as games, messenger applications (e.g. e2e encryption) or mobile applications (e.g. certificate pinning)? Frida to the rescue!
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Nov 2, 2023
Talk: Insecure GitHub Actions
You know GitHub Actions, these small building blocks that make your dev life easier… But they can also get you pwned in no time, if you are not careful.
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Oct 19, 2023
Intro Talks WS 2023/2024
Starting on the 2nd of November, we will be holding introductory talks for the main categories of Capture the Flag. We meet on Thursdays at 7pm in the CS building 50.34 room -120.
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Sep 21, 2023
Talk: Nix and NixOS
Slides, in German, for the talk What is Nix and NixOS. The talk was held on August 24, 2023.
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Jul 27, 2023
Talk: Introduction to V8 JIT Compilation
Deep dive in how the Chrome browser executes JavaScript and how this can break.
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Jul 7, 2023
Python Jail Escapes
At our weekly meetings we had a talk about Python jail escapes, aka. getting around restrictions that make it hard to execute
os.system('cat flag.txt')
. In the talk we went through challenges, that we present here as exercises to practice. Starting very simple and then digging more and more into python internals. -
Jun 22, 2023
Talk: Introduction to SpiderMonkey exploitation
How is javascript actually executed in firefox from the interpreter to the optimizing JIT compiler? This and other questions related to spidermonkey exploitation are answered in a walkthrough of the GPNCTF 2023 challenge icefox.
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May 19, 2023
Talk: Linux Namespaces
What are linux namespaces and how can we e.g. build docker using it?
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Apr 19, 2023
Intro Talks 2023
Starting on the 27th of April, we will be holding introductory talks for the main categories of Capture the Flag. We meet on Thursdays at 7pm in the CS building 50.34 room -120 (sometimes we may meet in room -118).
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Apr 13, 2023
Talk: Advanced Ghidra
We tame the dragon and get it to teamwork. This talk is about advanced Ghidra usage, specifically:
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Apr 10, 2023
Talk: Elliptic Curves 2
Continuation of Elliptic Curves 1 by Benedikt. Here are the Slides. As always CryptoHack is a great place to practice.
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Apr 4, 2023
Talk: CodeQL Workshop
Finding vulnerabilities at scale by doing static analysis with CodeQL. intrigus’ workshop tells you how!
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Feb 24, 2023
Talk: Lattice-based Cryptography
Continuing our theme of learning about foundations of modern crypto algorithms, Robert introduced us to lattices. Specifically we covered:
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Feb 23, 2023
Talk: Elliptic Curves
We look at curves that look like fish and do some maths to break some crypto. Benedikt shows us how.
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Feb 23, 2023
Talk: C++ Reversing
What weird things can happen when reversing C++ binaries and how not die from them? Slides of Liam’s talk from 2023-01-26.
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Feb 21, 2023
Talk: Intro to Smart Contract Exploitation
More and more CTFs include web3 challenges. On 2023-02-09 @mawalu talks about web3, common vulnerabilities in smart contracts, and touch on what you need to run a web3 challenge. We’ll do (ethereum) challenges afterwards!
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Feb 21, 2023
Intro Talks 2022
Archive of 2022 introductory talks. Even if you missed the talks, you can always attend our weekly in-person meetings: Thursdays 7pm, 50.34 room -120 (sometimes we may be in room -118).
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Jul 21, 2022
How to learn (non-exhaustive list)
Useful resources for learning hacking with CTFs.
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May 16, 2019
Einführungsvorträge im Sommersemester '19
Auch im Sommersemester 19 wird es Einführungsvorträge zu relevanten Themenbereichen geben.
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Nov 13, 2018
Folien der Vorträge im Wintersemester '18/19
Auch im Wintersemester 18/19 gab es wieder Einführungsvorträge zu relevanten Themenbereichen.
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Oct 15, 2018
Folien der Vorträge im Sommersemester '18
Binary Exploitation (07. Mai)
Hier sind die Folien des Einführungsvortrags zum Thema Binary Exploitation am 07.05.2018.
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Apr 23, 2018
Folien vom Einführungsvortrag im Sommersemester '18
Hier sind die Vortragsfolien vom heutigen Einführungsvortrag. Die Beispielaufgaben sind noch eine Weile verfügbar.
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Dec 11, 2014
Basic Tools
CTFs are about the skill, not about the tools. Still, you’ll need a couple of tools to be successful.
In general a good advice is to get used to working with the OS shell. There’s really a lot of things you can do very quickly and effectively if you know your way around bash/zsh/your_favourite_shell_here and python or your_favourite_scripting_language_here. -
Nov 13, 2014
Staying up-to-date in infosec
tl;dr just subscribe to r/netsec on reddit.
The following is a list of sources to help you stay up-to-date in infosec. If you’re just starting out it probably still can’t hurt to read some of the posts and try to understand them. More often than not they’ll also point you to introductory resources for the topic. -
Nov 13, 2014
Getting Started with CTF
We’ve created a small guide to get you started with CTF and more or less infosec in general. There are a few selected resources for each of the major CTF disciplines that should help you get up to speed in those.