Author:
Legacyy

Language:
C/C++

Upload:
10:47 PM 06/25/2021

Download

Platform
Windows

Difficulty:
2.0

Quality:
5.2

Arch:
x86

Description

Get the program to print "Congrats, you did it!" by entering a valid key (of which there are many) Bonus points: Make a keygen and figure out how the algorithms work

• Comments
• Solutions

4epuxa on 5:00 PM 07/01/2021: For newbies. Pass: 1234-2468-R3KT

puelo on 8:04 PM 07/01/2021: Nice quick crackme. Keygen: https://pastebin.com/1hW1Ujkg

Legacyy on 11:31 PM 07/01/2021: haha good work guys, glad you enjoyed :)

s3cana on 11:38 AM 07/02/2021: three check first check 1-9 second check x & 1 = 0 third check strcmp(x,'R3KT')

ka0s on 2:43 AM 07/05/2021: Lots of people don't understand the last strncmp :).

Legacyy on 6:36 PM 07/05/2021: yeah haha, it's not the whole string ;)

MKesenheimer on 8:08 AM 07/15/2021: Cracked it :) Thank you!

Legacyy on 12:23 PM 07/15/2021: Hope you enjoyed! @MKesenheimer

friturnica on 11:58 PM 07/27/2021: thank you! simple keygen on python: https://pastebin.com/UtwjB9XK

uglych on 1:53 PM 07/28/2021: 4444-XXXX-RXX last strncmp compares only first symbol so it could be RXX as well.

I2rys on 2:01 AM 10/11/2021: Cracked :)

muha2xmad on 6:15 PM 11/04/2021: Here is my writeup for this crackme https://youtu.be/3ublxMr7pg4

hack_the_moon on 5:31 PM 11/27/2021: nice one. people miss that it only compares 1 character in the last step, so for example this key is valid: 1234-8888-R000

th3h3d on 7:25 AM 12/03/2021: nice one!

knight on 11:06 AM 12/31/2021: Great one, Solved! :)

Onyx_Pl01t on 10:33 PM 01/04/2022: pretty nice CrackMe. i noticed that the check_three of your serial accepts character of length greater than 4 for example, 0123-2468-R1234567 for the case of your serial XXXX-XXXX-XXXX i made a bruteforce python script that give a serial in the desired format and input it automatically in the program. https://pastebin.com/h54DVPHy

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