Gadget was an electronic challenge at the Atast CTF. You get a schematic design for ISIS and .hex file for the PIC16F CPU. I choose to use the evaluation version of PIC Simulator just to visualize what this design was about: When you run the program, the 8 LEDs will […]
Description Are you 31337? Get your credentials checked here 94.45.252.242:1024 $ nc 94.45.252.242 1024 ID&PASSWORD 1337NESS EVALUATION Please enter your username and password User: aXs Password: toto u r not s0 1337zz!!! After some work in your favorite debugger, we can work with the reversing of our little binary: char […]
Mr. Menhall has invented his own encryption algorithm and promised to give the flag to anyone who manages to decipher the message: vWsMajX21l6BdKwDxaRA3utqhpvFL0V= def hashcrypt(msg, key): token = hashlib.sha1(key).digest() res = "" for c in msg: n = ord(c) ^ […]
We were able to intercept a suspicious file. This is an archive of correspondence between leading cryptographers of hostile organization. According to the agents’ data, during the conversation one of the respondents accidentally uses a file that is added as trusted to all computers of the organization. Their antivirus software […]
Have you tried feeding critical documents to a shredder? We’ve accidentally done this very thing. Shredder: shredder.exe Document remains: broken_flag.jpg We need our document back! See: http://hackyou.ctf.su/tasks/shredder Shredder is a Win32 binary that encrypt source file “flag.jpg” to “broken_flag.jpg”. The encryption is only some translations and swaps and can be […]
This challenge is about the control panel of the Southpark police department. (I wonder how many weird google searches I’m going to get on this post) You can choose an action and a victim. When you submit the form, it’s a simple AJAX call that will display “‘human’ was ‘action’” […]