crackmes.one

mrT4ntr4's Save Scooby

Author:
mrT4ntr4

Language:
C/C++

Upload:
4:19 PM 07/31/2019

Level:
1

Platform
Unix/linux etc.

Description

It seems Scooby forgot where he is. Help him find his way!! 1. Try to reverse without decompiling. (don't be lazy XD) 2. Patching is obviously not allowed. 3. Write a keygen. It's my first crackme so feel free to ping me for suggestions or feedback!! Contact : https://twitter.com/MrT4ntr4 Happy Reversing !! ;-)

BinaryNewbie on 1:37 AM 08/04/2019: Really easy, solved. I will post a write up. Thanks for the crackme.

BinaryNewbie on 1:45 AM 08/04/2019: I solved it, in a lazy way, i need to look better for write a keygen for him

juansacco on 9:07 AM 08/05/2019: Alternative solution to getcwd: Break on-runtime here: loc_559B769418B2: cmp [rbp+var_C], 0

juansacco on 9:07 AM 08/05/2019: Hi Scooby !! Where are you?? here You won a medal Scooby !!

Ephoria on 7:42 AM 08/11/2019: Thanks for this ! I will post 2 solutions of this program

mikejerez on 3:19 AM 08/13/2019: I reversed it and made a keygen in Python. Where can I post it?

mrT4ntr4 on 6:42 PM 08/13/2019: @mikejerez you can submit it in the solutions section. Read FAQ before submitting it though..

SYS_V on 3:50 AM 08/14/2019: Solved via DLL injection, replacing getcwd(). This method can be used to put Scooby anywhere. $ LD_PRELOAD=$PWD/inject_scooby.so ./save_scooby injected! Hi Scooby !! Where are you?? Jupiter You won a medal Scooby !! ###################################################### Source code of inject_scooby.so : #include #include char *getcwd(char *buf, size_t size) { printf("injected!\n"); return "Jupiter"; }

Ephoria on 5:08 PM 08/16/2019: Here is my solution: https://github.com/Dixyder/crackmes/tree/master/save_scooby

wrongbaud on 12:28 AM 08/29/2019: What is the password for the zip file?

maikelsec on 6:09 PM 09/01/2019: You won a medal Scooby !! was fun thnx for making

math__0x0 on 7:03 PM 09/26/2019: root@kali:~# ./save_scooby Hi Scooby !! Where are you?? $TQQV You won a medal Scooby !!

XilefEnork on 8:26 AM 10/06/2019: This was my first crack me, and it was the perfect difficulty. At first I struggled a little with the encryption but after some thinking it was pretty clear. Awesome crackme :)

spaceman on 4:50 PM 10/10/2019: This was a fun challenge and a great way to learn and sharpen my reversing skills, thanks :)