Codehead's Corner
Random ramblings on hacking, coding, fighting with infrastructure and general tech
Posted: 15 May 2016 by Codehead
4 minute read

This was a nice SQL injection challenge from TU CTF.

Challenge

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?

http://104.199.151.39/index.html


Categories: Hacking CTF
Posted: 18 Apr 2016 by Codehead
2 minute read

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.

Challenge:

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.


Categories: Hacking CTF
Posted: 17 Apr 2016 by Codehead
2 minute read

Challenge:

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.


Categories: Hacking CTF
Posted: 17 Apr 2016 by Codehead
3 minute read

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.

Challenge:

Welcome to Verticode, the new method of translating text into vertical codes.


Categories: Hacking CTF
Posted: 5 Apr 2016 by Codehead
4 minute read

Due the age of some of my email accounts and the stupid things I did when I was less careful with my contact details, I have a constant flow of spam and malware to some parts of my inbox. This is a good thing because I get to pick stuff apart and find out what’s going on in the shady world of digital con artists.

A few weeks ago I received several emails claiming to be important final demands. The messages urged me to view an attached document, which was a JavaScript file. That’s a pretty feeble attempt at phishing, but I guess some people might fall for it. I was interested to see what the script was actually going to do, so I tried to view the content. My mail client quite rightly denied me access to the file, even when I tried to bypass the blocks and warnings. In the end I had to go to the server and pull the attachment manually.


Categories: Malware Teardown
Posted: 27 Mar 2016 by Codehead
7 minute read

I only managed one task in the 2016 VolgaCTF, but it was a fun one. Coding a tic tac toe bot.

Challenge:

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

Categories: Hacking CTF
Posted: 22 Feb 2016 by Codehead
2 minute read

Challenge:

EquationSolver (exp60)

Description:

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?


Categories: Hacking CTF
Posted: 21 Feb 2016 by Codehead
3 minute read

Challenge:

File Checker (rev60)

Description:

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 :/


Categories: Hacking CTF
Posted: 21 Feb 2016 by Codehead
2 minute read

Challenge:

FlagStore (exp70)

Description:

Here’s the ultimate flag store. Store and retrieve your flags whenever you want.


Categories: Hacking CTF
Posted: 21 Feb 2016 by Codehead
2 minute read

Challenge:

It’s Prime Time! (code60)

Description: We all know that prime numbers are quite important in cryptography. Can you help me to find some?

Service: 188.166.133.53:11059

Solution:

Running netcat against the address gave the following output:

> nc 188.166.133.53 11059
Hi, you know that prime numbers are important, don't you? 
Help me calculating the next prime!
Level 1.: Find the next prime number after 5:

Categories: Hacking CTF
Site powered by Hugo.
Polymer theme by pdevty, tweaked by Codehead