General problem description Win the game 1,000,000 times to get the flag. For this challenge we got an .apk file, which we should apperently run and win 1,000,000 times. We let the online Java-decompiler at http://www.javadecompilers.com/apk. Running the apk on an Android-Phone or emulator shows us the game: Tic Tac Toe. We also get a counter 0/1000000 on the bottom of the screen. Each win increases the counter by one. Naive approach by recompiling the app We used...
We've been collaborating with LosFuzzys (https://hack.more.systems) for Google CTF and managed to solve a few challenges. This meetup, we'll go over some of those challenges. Where: @EI3A, TU Wien (Gußhausstraße 25, 1040 Wien, 2nd Floor) When: Thursday, 28.06.2018, 17:30 (CEST) What: Google CTF Recap...
Wargames by the OverTheWire Community (http://overthewire.org/wargames/) are a set of challenges to practice basic security concepts. Where: @EI3A, TU Wien (Gußhausstraße 25, 1040 Wien, 2nd Floor) When: Thursday, 21.06.2018, 17:30 (CEST) What: Wargames...
This meetup we will cover a basic introduction to Frida (https://www.frida.re/), a cross-platform dynamic instrumentation toolkit, and give a practical example of a past CTF challenge. Where: @EI3A, TU Wien (Gußhausstraße 25, 1040 Wien, 2nd Floor) When: Thursday, 14.06.2018, 17:30 (CEST) What: Intro to Frida Practical Example Challenge Frida and Android...
As an introduction to the last internet security challenge, we will give a short overview to writing exploits with pwntools. Where: @EI3A, TU Wien (Gußhausstraße 25, 1040 Wien, 2nd Floor) When: Thursday, 07.06.2018, 17:30 (CEST) What: Intro to pwntools Exploit Writing...
Next week, we will participate in FAUST CTF, an online attack-defense CTF. We will meet up at SBA Research and participate together. If you are curious about participating, what CTFs are or what's special about attack-defense CTFs, we are hosting this preparation meetup as part of our weekly CTF/Security meetup series. If you can't make it to the meetup, but still want to participate in the CTF, please contact us. Where: @EI3A, TU Wien (Gußhausstraße 25, 1040...
Where: @SBA Research (Favoritenstrasse 16, 1040 Wien, 1st Floor) When: Monday, 09.04.2018, 18:30 (CEST) What: Recap of past CTFs/challenges $YOUR_TOPIC_HERE$ and of course Socializing ;)...
yacs is a tool to store and later retrieve text snippets. If you store program source code there, it can even compile it for you! So handy. Of course, everything is protected using state-of-the-art user authorization and password hashing. It's a big C++ compiled binary which uses a local SQLite database file for data storage. Here's a normal create/list paste workflow: ___...
We participated in the RuCTF Finals 2017 and finished 12th.
Last Sunday we had the pleasure to participate in the RuCTF Finals 2017 in Yekaterinburg, Russia. After a long day of attacking other teams and defending our own services we managed to secure the 12th place out of 23 active teams. The services we had to work on were really interesting and quite diverse. But a really nice touch to the game was the actual hardware separation of services. Instead of providing a virtual machine...