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Crackme Write-Ups

Various musings as I try to get better at reverse engineering.

BinaryNinja crackme.exeBegin analysis now.

May 27, 2024
in Reverse Engineering
3 min read

RE Challenge: Pupsik's difficult crackme on crackmes.one

Binary

Name: Project10.exe 
Application Type: Windows(Vista)[AMD64, 64-bit, Console]

$ .\Project10.exe
Enter the username: test
Enter the password: test
Incorrect password. Try again.

March 8, 2024
in Reverse Engineering
2 min read

RE Challenge: im-razvan's ExotiCTF on crackmes.one

Binary

Name: exotictf1.exe 
Application Type: PE64 - Windows(Vista)[AMD64, 64-bit, Console]

$ .\exotictf1.exe
Enter the PIN : 1234
Wrong PIN! Try again.

February 28, 2024
in Reverse Engineering
5 min read

RE Challenge: mstik13's ObfuscationFiesta on crackmes.one

Binary

Name: ObfuscationFiesta.exe
Application Type: PE64 - Windows(Vista)[AMD64, 64-bit, Console]

$ .\ObfuscationFiesta.exe
Enter a key: test
Loading: ==========
Loading: ==========
Loading: ==========
Enter the secret code (Hint: Combine odd and even numbers): 234567
Incorrect secret code. Verification failed.

February 24, 2024
in Reverse Engineering
3 min read

RE Challenge: nuts9753's interesting crackme on crackmes.one

Binary

Name: crackme.exe
Application Type: PE64 - Windows(Vista)[AMD64, 64-bit, Console]

$ .\crackme.exe
Enter the code: test
The code is incorrect!

February 15, 2024
in Reverse Engineering
8 min read

RE Challenge: nuts9753's game crackme on crackmes.one

Binary

Name: gameCrackme.exe
Application Type: Windows(Vista)[AMD64, 64-bit, Console]

$ .\gameCrackme.exe
Enter the activation key: test
The key is incorrect.

February 11, 2024
in Reverse Engineering
3 min read

RE Challenge: ArjunRajesh's FLAG on crackmes.one

Binary

Name: tryme
Application Type: ELF64 - Gentoo Linux(ABI: 3.2.0)[AMD64, 64-bit, DYN]

$ ./tryme test
Wrong flag

February 11, 2024
in Reverse Engineering
2 min read

RE Challenge: cutypie's Basic Password Challenge on crackmes.one

Binary

Name: basic.exe
Application Type: Windows(Vista)[AMD64, 64-bit, Console]

$ .\basic.exe
Username: test
Enter your password: test
Invalid input. Please enter a valid unsigned integer: 1111
Bad

February 10, 2024
in Reverse Engineering
3 min read

RE Challenge: Clyax's Easy Password Reverse 2 on crackmes.one

Binary

Name: reverse.exe
Application Type: Windows(Server 2003)[AMD64, 64-bit, Console]

$ .\reverse.exe
Username: test
Password: test
Bad