Hello, Here are some hints for solving the Debug Me challenge on HackThebox: Use a good debugger like x64dbg Use an anti-anti-debugging plugin like Scylla Hide. (read the instructions on how to install it) Step through the challenge and see where it takes you. Thanks!
Keygenme or Not is a cute reversing challenge I found on root-me.org. It requires an username and an activation key. I particularly enjoyed this challenge and decided to make a blog post about it. The twist of this challenge is that you can solve it without writing any code, thus the name ‘Keygenme or Not’. If you want to solve this challenge but you’re stuck you should definitely give it one more try because solving it is very easy. Come back if you’d like to see the keygen code and my thoughts about this challenge. Let’s imagine that this is in fact a useful program with poorly implemented protection. The program KMN is registered to the user ‘root-me.org’ and will work only with their key. Using any other combination of username and key won’t make the program work, even if they’re valid. ...
Hello, If you open this binary in Binary Ninja or any other disassembler, you’ll see a that the flow is quite weird. After looking at the strings tab I found UPX listed in there, this explains the weird graph. UPX is an open-source packer. A packer is just a piece of software that compresses the binary, when the binary is run it will unpack itself. Packing an exe could reduce it’s size by 30% or so.. since UPX is free you could also use it to unpack binaries. Unpacking is left as a exercise to the reader (I’m lazy) ...