Monthly Meetup Monday

November Monthly Meetup! As always Open-to-All!

  • Where: @SBA Research (Floragasse 7, 1040 Wien, 5th Floor)
  • When: Monday, 06.11.2023, 18:30 (CET)
  • What:
    • Talk: Pwning with Python (intro to coding/automating exploits)
    • Plans for saarCTF and Attack/Defense infrastructure

Google CTF 2023 - oldschool

Write an oldschool keygen for an oldschool login interface.

Google CTF 2022 presented us with oldschool, a typical, as the name suggests, oldschool crackme with an ncurses terminal interface. The goal of the challenge was to write a keygen, which would be able to generate keys for a list of users provided by the CTF organizers. The official and detailed writeup is available here, which goes through the intended solution of manually reverse engineering the key verification algorithm. However, since we are researchers (and most importantly, too lazy to manually...

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DiceCTF 2023 - chess.rs

🚀 blazingfast rust wasm chess 🚀

TL;DR chess.rs is a pwn(/web) challenge using Rust with WebAssembly. The goal is to extract the cookies of the admin browser bot. We have a rust webserver providing two pages index.html (graphical frontend) and engine.html ("backend", runs the wasm logic). index.html loads engine.html as an iframe. They send messages through .postMessage and receive them through the window.onmessage event listener. There is a hidden parameter in the init function on engine.html that allows setting a custom board position...

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Monthly Meetup Monday

August Monthly Meetup! As always Open-to-All!

Where: @SBA Research (Floragasse 7, 1040 Wien, 5th Floor) When: Monday, 05.08.2018, 18:30 (CEST) What: Plans for upcoming CTFs Reviewing challenges of past CTFs $YOUR_TOPIC_HERE$ and of course Socializing ;)...

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CTF Meetup

ctf

This time we don't have anything planned in particular, but if you're curious about CTFs you can just come and hang out with us. We might work on some OverTheWire Advent Calendar challenges as well. Where: @FH4, TU Wien (Wiedner Hauptstraße 8-10, 1040 Wien, Yellow Area) When: Thursday, 06.12.2018, 18:30 (CET) What: Nothing planned in particular Casual CTF discussion/challenge solving...

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CTF Meetup: angr Intro and Lab Challenge Discussion

ctf, angr, lab

With this meetup we'll give another angr introduction, presenting the tutorial here. This introduction makes it a lot easier to solve the ragequit lab challenge and we will also be answering questions about said challenge. Where: @FH4, TU Wien (Wiedner Hauptstraße 8-10, 1040 Wien, Yellow Area) When: Thursday, 29.11.2018, 18:30 (CET) What: angr Introduction Q&A and Hints about the Lab Challenge...

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CTF Meetup: gnuradio Lab Challenge and More

ctf, gnuradio

Back on track after RuCTF, and we'll start with an overview of the AVR architecture, which is relevant for the current lab exercise of Advanced Internet Security. We'll also show how the gnuradio challenge can be solved without actually using gnuradio and afterwards we're gonna pick one CTF challenge and work on it. Where: @FH4, TU Wien (Wiedner Hauptstraße 8-10, 1040 Wien, Yellow Area) When: Thursday, 15.11.2018, 18:30 (CET) What: AVR Architecture Overview Working on the signal.dump without gnuradio Reviewing/Working on...

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CTF Meetup: Lab Challenge Review and RuCTF

RuCTF, botnet-takedown

Today we'll be giving a walkthrough of the first lab challenge of Advanced Internet Security, botnet-takedown, and we're gonna talk about the (Russian) elephant in the room: RuCTF. The CTF will happen on Saturday and we'll meet up at 10:00 CET, let us know if you want to join in. Where: @FH4, TU Wien (Wiedner Hauptstraße 8-10, 1040 Wien, Yellow Area) When: Thursday, 08.11.2018, 18:30 (CET) What: botnet-takedown Walkthrough RuCTF: Gameplay and Infrastructure...

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Hack.lu CTF 2018 - Rusty CodePad

Rust Safe Code Bypass

Description I heard Rust is a safe programming language. So I built this CodePad where you can compile and run safe Rust code. Initial Situation We had access to a web-terminal with a limited set of commands: $ help help - print this help clear - clear screen ls - list files cat - print file content rusty - compile rusty...

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