TLOD's Another KeygenMe

Author:
TLOD

Language:
C/C++

Upload:
2021-05-31 16:04

Download

Platform:
Windows

Difficulty:
3.0

Quality:
4.5

Arch:
x86

Downloads:
15

Size:
13.00 KB

Writeups:
2

Comments:
6

Description

Lets pretend you just downloaded a program called encryprion kira to crack encryption, but it asks you for your name and the matching password so you can use it. Your goal is to write a keygen, so you can access this awesome program. Patching is not a viable solution. In case of problems dm me on discord: TLOD#0882 Enjoy!

Comments (6)
Writeups (2)

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4epuxa on 2021-06-06 19:11: [Click to reveal]

aolvos on 2021-06-07 12:07: hmm.. looks like key depends on a system time, cause 4epuxa's login info isn't always accepted. very interesting keygenme!

aolvos on 2021-06-09 08:19: Yep! i was right. program generates random seed [1..5] on startup. that's why there're 4 passwords for 1 username. i almost finished working on keygen, will post solution soon) here is an example: [login info] username: aolvos password #1: 68827 password #2: 394198659 password #3: 205588 password #4: 301

xmaple555 on 2021-06-22 17:50: it is not difficult, but too long. and using time() and mod srand() cause me inconvenient that i need to input username and password instantly after i run my write-up program.

TLOD on 2021-06-23 16:18: xmaple555 do you don't have to input it instantly

ansejrtj on 2022-02-10 23:58: waiy

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Solution by aolvos on 2021-06-09 10:31:
finally i did it! write_up + keygen inside!

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Solution by g3chantr on 2022-01-19 23:10:
Thank's for this chall !!! This solution contains a detailed analyse and a little kegen for a given username

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crackmes.one

crackmes.one

TLOD's Another KeygenMe