EmilianoFT's Hola Mundo Crackme

Author:
EmilianoFT

Language:
.NET

Upload:
2019-05-04 12:35

Download

Platform:
Windows

Difficulty:
2.0

Quality:
2.5

Arch:
x86

Downloads:
26

Size:
8.50 KB

Writeups:
0

Comments:
2

Description

Enter the correct password to get the message "Hola Mundo!"

Comments (2)
Writeups (0)

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nextco on 2019-05-24 22:27: This crackme is how not make a RE challenge: All core is based on 3DES, like: key = md5(strong_and_unique_key) decryption_suite = DES3.new(key, DES3.MODE_ECB) decrypted_bytes = decryption_suite.decrypt(b64decode(data)) You see, the only approach for get the key is bruteforce. The "example" keys for hidding messages are: xzxzx, xzxzxz, xzx, xzxzxzxzx, xzxzxzxzxy, xzxzxzxzx. Hence is expected the dictionary {x, z} and variable length. The autor at this point change the rules and put a strong password (ascii_uppercase + ascii_lowercase + digits + symbols). This is bored, because the strong of the crackme is based on a crypto function, nothing to reverse.

ryancor on 2019-10-13 17:31: Yea on top of that, the actual encrypted text the dude gave has a padding error in .NET. These challenges really need to be vetted by the admins of this website, and require a write per every challenge submission

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EmilianoFT's Hola Mundo Crackme