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Thursday, December 23, 2010

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How to crack passwords of rar/zip/7z files?

RarCrack is a program that uses brute force algorithm to find andrecover the correct password for compressed archive in .rar (WinRAR),.7z (7-Zip) and .zip (WinZip) format in any POSIX compatible operatingsystem. As such, RarCrack is useful when you have forgotten or lost thepassword for the compressed archive package in the supported format. Tomake bruteforce password breaking faster, RarCrack supports specifyinga selection of characters and digits to be used in password generationsin order to crack the password.

The guide below is a brief explanation on how to use RarCrack torecover and retrieve back the password for .rar, .7z or .zip files. 

Note that RarCrack requires glibc 2.4, pthreads and libxml2 librariesin order to work. Use rpm, pkg_add, apt-get and other commands toinstall the dependencies if it’s not installed yet.
  1. Download RarCrack by using the one of the following commands (just the difference of downloading mirror) in terminal:wget http://superb-east.dl.sourceforge.net/sourceforge/rarcrack/rarcrack-0.2.tar.bz2
    wget http://kent.dl.sourceforge.net/sourceforge/rarcrack/rarcrack-0.2.tar.bz2
    wget http://nchc.dl.sourceforge.net/sourceforge/rarcrack/rarcrack-0.2.tar.bz2

  2. Extract the RarCrack archive:
    tar -xjf rarcrack-0.2.tar.bz2
  3. Change directory into the extracted RarCrack folder:
    cd rarcrack-0.2
  4. Install the RarCrack with the following command:make
    sudo make install (so simply make install if already login as root)

  5. To crack or break the RAR, 7z or ZIP file Password, use the following syntax:
    rarcrack encrypted_archive.ext [--threads thread_num] [--type rar|zip|7z]
    The switch in [] is optional. RarCrack can autodetect the archivetype, so the –type parameter only require if auto-detection of filetype is wrong. And by default, RarCrack launches two cracking threadsif no thread number is specified.
    For example,
    rarcrack example.rar
    rarcrack forgetpassword.zip
  6. After starting the process to break and crack the password,RarCrack will print and save the current status of cracking to a XMLstatus file. Any valid good password to open the archive, if found,will be printed as good_password variable. An example of the XML fileis as follow:


    Tip: If you can barely remember the password but pretty confidentthat only certain characters or digits are used, modify the “abc”character set to include those characters or numbers only. 
    On firstuse, run the RarCrack to generate the XML status file, then edit thenfile and rerun the RarCrack again.

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About 'Anu': My name is 'Anu' also Known as 'ANU 007 TIGER' .I'm administrator of 'PC Tips by Anu' blog .This blog was opened for sharing contents about hacking n cracking.


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