Link to archived challenge Category Difficulty Solves Author reverse hard 3 sudoBash418 Description This one seems a bit trickier than the last. Good news though: I received word of a new form of black magic called “symbolic execution” - supposedly it can extract flags from even the trickiest of binaries! Have fun! Players are given two files to download: flag-checker and flag-checker-arm64. There are also three hints available: angr should prove useful....
Link to archived challenge Category Difficulty Solves Author reverse hard 1 sudoBash418 Description Looks like they’ve gotten smarter: this time the flag is locked behind a hash function! You might need the dark art of optimization for this one. I’m sure you’ll figure it out. Can’t promise you won’t be cursed in the process though :P Players are given two files to download: flag-checker and flag-checker-arm64. There are also three hints available:...
Link to archived challenge Category Difficulty Solves Author reverse easy 20 sudoBash418 Description We’ve found a password verifier made by 0ph10n, one of the t3l0s operatives. Rumor has it, this password controls access to some of their monitoring services, which would be very valuable to our efforts. Can you figure out what the correct password is? Players are given a file to download: password_checker.py. Analysis The script we’re given is a basic password checker: it asks for the password and tells you if it’s correct or not....