Legacyy's Keygen me Quick!

Author:
Legacyy

Language:
C/C++

Upload:
2021-06-25 22:47

Download

Platform:
Windows

Difficulty:
1.9

Quality:
5.2

Arch:
x86

Downloads:
21

Size:
419.00 KB

Writeups:
5

Comments:
17

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 (17)
Writeups (5)

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4epuxa on 2021-07-01 17:00: [Click to reveal]

puelo on 2021-07-01 20:04: Nice quick crackme. Keygen: https://pastebin.com/1hW1Ujkg

Legacyy on 2021-07-01 23:31: haha good work guys, glad you enjoyed :)

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

ka0s on 2021-07-05 02:43: Lots of people don't understand the last strncmp :).

Legacyy on 2021-07-05 18:36: yeah haha, it's not the whole string ;)

MKesenheimer on 2021-07-15 08:08: Cracked it :) Thank you!

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

friturnica on 2021-07-27 23:58: thank you! simple keygen on python: https://pastebin.com/UtwjB9XK

uglych on 2021-07-28 13:53: [Click to reveal]

muha2xmad on 2021-11-04 18:15: Here is my writeup for this crackme https://youtu.be/3ublxMr7pg4

hack_the_moon on 2021-11-27 17:31: 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 2021-12-03 07:25: nice one!

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

Onyx_Pl01t on 2022-01-04 22:33: 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

Wiktuur on 2023-06-25 21:41: [Click to reveal]

faisal098 on 2024-04-26 23:25: nice challenge i would say it's not too easy spoiler| | the first four digits is any number the second four digits is an even number the third four digits i think it was supposed to be "R3KT" but it only checks for the "R"

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Solution by dev0 on 2021-07-05 17:12:
Write up with a C source keygen file

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Solution by igorprostoff on 2021-07-13 20:21:
A step-by-step solution for the crackme using ghidra disassembler.

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Solution by ice_cracked on 2021-08-07 09:24:

Download

Solution by InsideExploit on 2021-08-25 23:50:

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Solution by goldenboy on 2021-12-13 22:48:
my solution

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crackmes.one

crackmes.one

Legacyy's Keygen me Quick!