Fcrackzip is a password cracking tool for ZIP files. Fcrackzip cracks the password by Brute-Force Attack or by a Dictionary Attack.

In a Brute-force Attack the attacker checks all the known combinations of passwords until the correct password founds.

Dictionary Attack involves providing a wordlist which contains a set of commonly used passwords.

Installation

sudo apt install fcrackzip

Usage

The general usage of fcrackzip for brute forcing the password is as follows. fcrackzip -v -b -u <file_name.zip>

• -v for knowing what's going on in background. Commonly Know as verbose.
• -b for brute-forcing.
• -u for unzip.
• -p for setting the initial password for brute forcing or the file to supply password for dictionary attack.
• -D sets dictionary mode and reads passwords from a wordlist alphabetically.

The general usage for the dictionary attack is as follows. fcrackzip -v -u -D -p <path_to_wordlist_file> <file_name.zip>

The common wordlist which is publicly available is rockyou.