fcrackzip is a versatile tool for cracking password-protected zip files. Beyond the basic usage, there are several advanced techniques and tips that can help you use the tool more effectively. Is installed on Kali
81 KB
To install fcrackzip, use the following command:
sudo apt install fcrackzip- fcrackzip: A Free/Fast Zip Password Cracker
To display help and usage information, run the following command:
fcrackzip -hSpecify a custom character set to limit the brute force attack to specific characters:
fcrackzip -b -c 1234567890 -l 1-4 protected.zipThis command limits the attack to numeric characters and checks passwords of length 1 to 4.
Speed up the cracking process by splitting the task across multiple machines or processes. For example, you can divide the character set and length range:
fcrackzip -b -c abcdefghijklmnopqrstuvwxyz -l 1-3 part1.zip &
fcrackzip -b -c ABCDEFGHIJKLMNOPQRSTUVWXYZ -l 1-3 part2.zip &This runs two processes in parallel, each working on different sets of characters.
If you have multiple dictionaries, you can concatenate them and use the combined file:
cat dict1.txt dict2.txt > combined_dict.txt
fcrackzip -D -p combined_dict.txt protected.zipImprove accuracy by using unzip to filter out incorrect passwords:
fcrackzip -u -D -p dictionary.txt protected.zipThis ensures only valid passwords are considered.
Run a benchmark to see how fast your system can crack passwords:
fcrackzip -BThis can help you estimate how long a full crack might take.
Limit the password length range to speed up the attack:
fcrackzip -b -c aA1 -l 4-8 protected.zipThis command will only check passwords with lengths between 4 and 8 characters.
If you have a starting point or known part of the password, you can use it to start the attack:
fcrackzip -b -p knownpart protected.zipEnable verbose mode for more detailed output:
fcrackzip -v -b -c aA1 -l 1-8 protected.zipSanity-check the algorithm to ensure it's working correctly:
fcrackzip -VTo display information about a zip file, use:
fcrackzipinfo --helpTo parse and display information about protected.zip, use:
fcrackzipinfo protected.zipfcrackzip and fcrackzipinfo were written by Marc Lehmann.
For further details and updates, visit the fcrackzip project page.
If you find this project useful and want to support it, there are several ways to do so:
- If you find the white paper helpful, please ⭐ it on GitHub. This helps make the project more visible and reach more people.
- Become a Follower: If you're interested in updates and future improvements, please follow my GitHub account. This way you'll always stay up-to-date.
- Learn more about my work: I invite you to check out all of my work on GitHub and visit my developer site https://volkansah.github.io. Here you will find detailed information about me and my projects.
- Share the project: If you know someone who could benefit from this project, please share it. The more people who can use it, the better. If you appreciate my work and would like to support it, please visit my GitHub Sponsor page. Any type of support is warmly welcomed and helps me to further improve and expand my work.
Thank you for your support! ❤️