Howto Crack Rar, 7z, and zip files in Linux
Posted by Admin on April 24th, 2008
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Warning: Please don’t use this program for any illegal things!
Preparing your system
First you need to install the following package
#apt-get install libxml2-dev build-essential
Now you need to download the latest version of rarcrack from here
#wget http://surfnet.dl.sourceforge.net/sourceforge/rarcrack/rarcrack-0.2.tar.bz2
Now you have rarcrack-0.2.tar.bz2 file and you need to extract this file
#tar -xjf rarcrack-0.2.tar.bz2
#cd rarcrack-0.2
#make
You must be root to run the following command
#make install
Using Rarcrack
rarcrack your_encrypted_archive.ext [--threads thread_num] [--type rar|zip|7z]
Example
rarcrack something.rar
After the cracking started RarCrack will print the current status of cracking and save it’s to a status file. If you want more specific password character set, you need to run RarCrack to create the XML status file (3 sec).
August 12th, 2008 at 1:27 am
how if the file is a exe that was a rar ? exe with password.
please help
September 27th, 2008 at 3:47 am
I tested rarcrack but failed.
A file (a.txt) was crypted by WinRAR 3.5 with password ‘aa’. The encrypted file is a.rar.
./rarcrack a.rar
RarCrack! 0.2 by David Zoltan Kedves (kedazo@gmail.com)
INFO: detected file type: rar
INFO: cracking a.rar, status file: a.rar.xml
Probing: ‘p8′ [539 pwds/sec]
it didn’t found ‘aa’.
George
October 17th, 2008 at 1:31 pm
i forget it my zip folder file help me when i get my password or breaker it and the folder has four file
October 22nd, 2008 at 10:55 am
Of course, brute force can sometimes useful but in most cases it’s not (the same for this program approach).
On my 1.6Mhz/512MB it’s an average of 50pass/sec which means 180.000 password/h. Pretty impressive but…
Let’s consider we have 62 digits to try (A-Za-z = 52, 0-9 = 10). This means
2 digits pass = 62 * 62 = 3844 possible combinations
3 digits pass = 62^3 = 246.016 possible combinations
…
and for a simple 5 digits pass means 62^5 = 916.132.832 combinations.
How take this number, divide it by 180k pass/h and we’ll have more than 5000h ~ 212 days of non stop trying. Put a 8 character password and you’ll end up with a lifetime.
A more friendly approach (I saw it long time ago) was to remove the password from the file and modify the file flag to nonpass situation, but I’m not quite sure if it’s still working.