Crack a password protected Zip file

Welcome this is a WalkThrough on how to crack a password protected zip for writen by AnonymousFigure.

This was completed in Kali Linux. All tools come pre-installed.

First get a password protected zip file.

The pass zip we have has a 4-6 digit passcode

Lets start.

fcrackzip -b -c a -l 4-6 -u (zipfile location)

Other ways

fcrackzip -v -m zip6 -l 4-8 -u

To break the command down:

v is for verbose and gives you better output

m specifies the mode to use, in this case zip6

l specifies the minimum password length to maximum password length

u tells the program to test the password with unzip before declaring it correct

Crack with a wordlist.

fcrackzip -v -D -u -p /usr/share/dict/words

Here the only difference is the -D to specify a dictionary based attack and -p 

which is used to specify the password file. This file should contain one word 

per line and on Linux systems there's a nice dictionary included in /usr/share/dict/words.

USAGE: fcrackzip

          [-b|--brute-force]            use brute force algorithm

          [-D|--dictionary]             use a dictionary

          [-B|--benchmark]              execute a small benchmark

          [-c|--charset characterset]   use characters from charset

          [-h|--help]                   show this message

          [--version]                   show the version of this program

          [-V|--validate]               sanity-check the algortihm

          [-v|--verbose]                be more verbose

          [-p|--init-password string]   use string as initial password/file

          [-l|--length min-max]         check password with length min to max

          [-u|--use-unzip]              use unzip to weed out wrong passwords

          [-m|--method num]             use method number "num" (see below)

          [-2|--modulo r/m]             only calculcate 1/m of the password

          file...                    the zipfiles to crack

methods compiled in (* = default):

 0: cpmask

 1: zip1

*2: zip2, USE_MULT_TAB

Last modified: Friday, 11 March 2016, 8:18 AM