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5:13 PM 09/10/2023
Description
very easy crackme for you :)
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0x5E778 on 3:03 PM 09/15/2023: my first crackme, nice and easy
Shiey on 4:28 PM 09/16/2023: If you get a 'Welcome' message, does it means you solved it ?
mt77 on 4:42 PM 09/17/2023: yes, welcom its flag about the true :)
Kweezo on 7:20 PM 09/17/2023: Pretty fun. My very first crackme :)
b3n on 1:34 AM 09/21/2023: Hmm, not sure if it takes away the fun or is just the new way of doing things... but I just used a decompiler and put the somewhat complicated looking luna function into ChatGPT - which spilled the beans. "Now give me a number that will pass it". EzPz
NgAnVinh07 on 2:49 PM 09/21/2023: password is 1111111
cnathansmith on 7:25 AM 09/24/2023: @b3n the whole point is just to learn. The simpler ones are a good opportunity to try out new techniques. It's cool that you were able to find a way to solve it with ChatGPT, but then try a different approach on the next one, and so on. Then submit writeups so we can learn too!
I3a4dam on 10:07 PM 09/24/2023: I have just started out with studying reverse engineering and this task was great for a beginner like me. Thank you!
bang1338 on 7:28 AM 09/25/2023: nice crackme, i rewrited it in c++ so i can run it on windows... i didn't run it on windows lol
bang1338 on 7:29 AM 09/25/2023: correction: i didn't run it on linux lol
bang1338 on 1:22 PM 09/26/2023: solved
also gg cnathansmith
GeorgeIsReverseEngineering on 10:53 AM 09/30/2023: Where do I find the password?
garfoxteam on 7:53 PM 10/05/2023: password zip : crackmes.one
Soncute2511 on 5:05 AM 10/13/2023: How to solve this problem?
Soncute2511 on 5:06 AM 10/13/2023: I tried to use gdb but idk some functions that work
You must be logged in to submit a writeup
Solution by cnathansmith:
Walkthrough and keygen source code implementing the atypical approach of converting the target into a shared library to directly interface with program functions externally
Solution by bang1338:
A writeup of my process and solution.
In zip file contain:
- Bunch of image instead hosted on Discord
- a markdown, which is my writeup and solution. Require a GitHub-like markdown reader like Markdown Monster
- A Python script to solve, require Python 3.x
- A decompiled source code of luna crackme (C++, recommend gcc)
Side note: gg cnathansmith
Solution by jacblo:
i solved it without brute forcing.
Solution by benni:
This solution extracts the password verify function and generates/bruteforces the password based on the password verify function.
Solution by thmUNIX:
Yet another bruteforce solution. Includes a PDF guide and a C++ program that solves the task.