fcrackzip is a fast password cracker partly written in assembler. It is able to crack password protected zip files with brute force or dictionary based attacks, optionally testing with unzip its results.It can also crack cpmask’ed images.

Install fcrackzip in ubuntu

sudo apt-get install fcrackzip

fcrackzip Syntax

fcrackzip [-bDBchVvplum2] [--brute-force] [--dictionary] [--benchmark] [--charset characterset] [--help] [--validate] [--verbose] [--init-password string/path] [--length min-max] [--use-unzip] [--method name] [--modulo r/m] file…

fcrackzip Examples

fcrackzip -c a -p aaaaaa sample.zip

checks the encrypted files in sample.zip for all lowercase 6 character passwords (aaaaaa … abaaba … ghfgrg … zzzzzz).

fcrackzip --method cpmask --charset A --init AAAA test.ppm

checks the obscured image test.ppm for all four character passwords. -TP fcrackzip -D -p passwords.txt sample.zip check for every password listed in the file passwords.txt.
sources: HYIP-Man, ubuntugeek