Bibilmeshka's Find CTF in license checker

Author:
Bibilmeshka

Language:
C/C++

Upload:
2025-04-20 13:41

Download

Platform:
Windows

Difficulty:
2.3

Quality:
4.0

Arch:
x86-64

Downloads:
83

Size:
604.86 KB

Writeups:
2

Comments:
11

Description

You need to find a flag (flag format: CTF{text}). You can find a license key or just patch this program to any license.

Comments (11)
Writeups (2)

You must be logged in to post a comment

UnknownAgent123 on 2025-04-21 19:39: [Click to reveal]

dark_sword77 on 2025-04-21 20:09: Just patched this program to any license by changing one jump statement lol

BugsBunny on 2025-04-23 09:48: Is anyone else also facing using when opening the license_checker.rar?

ericxu833 on 2025-04-23 15:20: [Click to reveal]

soulOfCinder on 2025-04-23 20:13: Really good and interesting . I also found the jump command and patched it .

pizzacruda on 2025-04-26 22:34: # We are looking for an 8-digit number that meets the three conditions: # 1. n % 59 == 12 # 2. n % 113 == 12 # 3. The last byte of the number is equal to 0x55 (i.e., n & 0xFF == 0x55) # Define the search range: 8-digit numbers (from 10000000 to 99999999) for n in range(10000000, 100000000): # Searching between 10 million and 100 million if n % 59 == 12 and n % 113 == 12 and (n & 0xFF) == 0x55: result = n break print(f"The number that meets the conditions is: {result}") // El número que cumple las condiciones es: 11060565

iAniket9 on 2025-04-27 15:01: [Click to reveal]

khoinguyenquang16 on 2025-05-05 09:56: Locate where the validateLicenseKey function is called in main and patch the jz operant after the function to bypass the validation.

Danko on 2025-05-29 19:24: [Click to reveal]

Danko on 2025-05-29 19:29: Sorry: CTF-11060565,CTF-53729365,CTF-96398165

wutan on 2025-06-17 10:55: great crackme

Show all spoilers

You must be logged in to submit a writeup

Solution by f0ur3y3s on 2025-04-24 14:31:

Download

Solution by brandon_w on 2025-04-24 17:29:

Download

crackmes.one

crackmes.one

Bibilmeshka's Find CTF in license checker