I almost missed the Tokyo Westerns CTF. I stumbled across the event on the last day and wasn’t able to spend too long on it. I managed a few of challenges, mainly the PPC category. However, I wanted to write up the ‘Glance’ image manipulation challenge for future reference.
I saw this through a gap of the door on a train.
Here’s a nice little 10 point binary challenge from CTF(x) 2016.
We’re told of a vulnerable service running at problems.ctfx.io 1338. We’re also given the source code:
The LabyREnth competition ran from 15th July to 14th Aug. I only managed to find time to do the first Windows challenge. It was a tricky one and I was only able to work at it in fits and starts, often with days or weeks between sessions. However, I learnt quite a few handy new things while working on it, so I’m writing this as a reference for myself and as an example of the dead-ends and rabbit holes of the analysis process for those who are interested.
This was a nice SQL injection challenge from TU CTF.
We are trying to find out what our grade was, but we don’t seem to be in the database…
Can you help us out?
This was a nice little web challenge from sCTF. I’m trying to do more web challenges as it’s one of my weaker areas.
The ducks and I have a unfinished score to settle.
http://ducks.sctf.michaelz.xyz/
Hint:
If you’ve remember HSF, you’ll know that The Ducks is unsolvable.
Welcome to Vertinet.
This problem follows the same specifications as the previous Verticode problem, except that you have to solve many of them by developing a client to communicate with the server available at problems1.2016q1.sctf.io:50000. Good luck.
This was a nice little challenge from sCTF 2016. I’m trying to work on more tricky stuff, but this one looked like fun and I couldn’t resist.
Welcome to Verticode, the new method of translating text into vertical codes.
I only managed one task in the 2016 VolgaCTF, but it was a fun one. Coding a tic tac toe bot.
Tic-Tac-Toe An important step towards the strong AI is the ability of an artificial agent to solve a well-defined problem. A project by the name 'tic-tac-toe' was one of such test problems. It's still up... nc tic-tac-toe.2016.volgactf.ru 45679
EquationSolver (exp60)
I created a program for an unsolveable equation system. My friend somehow forced it to solve the equations. Can you tell me how he did it?
File Checker (rev60)
My friend sent me this file. He told that if I manage to reverse it, I’ll have access to all his devices. My misfortune that I don’t know anything about reversing :/