ttlhacker's hard_software



2:06 PM 06/01/2019


Unix/linux etc.


Another x64 Linux crackme. Reads input from stdin and tells you if it's correct or not after thinking about it for a second or so. Most of the binary was generated by a custom tool. While it's quite large, it doesn't contain any dead code or unused variables. It also doesn't have anti-debugging features, doesn't play weird games with exception handlers, doesn't modify itself and doesn't even have much control flow to speak of. I'm pretty sure it'll be an absolute nightmare to analyze despite this. And I don't think dynamorio will be of much help with this one. ;)

s4r on 8:04 AM 06/04/2019: I hope I'll have time to solve it soon. Looks really complex!

pinnn on 7:39 AM 06/07/2019: Nice! It's been a long time since there was a difficult task.

Zibri on 2:42 PM 06/10/2019: I would love to have your email, ttlhacker.

ttlhacker on 5:09 PM 06/10/2019: You can reach me at this email, Zibri: 74746c6861636b6572406f75746c6f6f6b2e636f6d (hex ascii to keep the spammers out)

x0r19x91 on 11:58 AM 06/13/2019: Highly obfuscated.Got to analyze closely