John The Ripper! (details)
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Thread: John The Ripper! (details)

  1. #1
    I am a cracker
    Guest

    Lightbulb John The Ripper! (details)

    I wrote this tutorial for helping the (Newbies) out. I go to www.hackers.com www.elitehackers.com and sometimes at www.antionline.com I see all these threads about how do I crack a password file or How do "I use John the Ripper" I have a fealing I will get flamed and people will hurl insults to me for trying to help.

    Here it is
    John the Ripper
    Difficulty: Extremely Easy if you can not do this you should not be on a computer
    Learn to use this tool to crack passwd files



    Below is an example passwd file:

    jeunehom:uRavlb2TZc7fA:10009:100:Fanny JEUNEHOMME,Promo2001:/home/jeunehom:/bin/bash cellier:6VVFRl.ib8J4E:10012:100:Remi Cellier,Promo2001:/home/cellier:/bin/bash dischamp:bAndzoL65f2sY:10017:100:Sylvestre Dischamp, Promo2001:/home/dischamp:/bin/bash artus:z0A3df0OmqmFI:10027:100:Guillaume ARTUS,Promo2001:/home/artus:/bin/bash

    This is what it would appear like with most exploits, so now you have to break the passwd file up into single line entries as follows:

    jeunehom:uRavlb2TZc7fA:10009:100:Fanny JEUNEHOMME,Promo2001:/home/jeunehom:/bin/bash
    cellier:6VVFRl.ib8J4E:10012:100:Remi Cellier,Promo2001:/home/cellier:/bin/bash
    dischamp:bAndzoL65f2sY:10017:100:Sylvestre Dischamp, Promo2001:/home/dischamp:/bin/bash
    artus:z0A3df0OmqmFI:10027:100:Guillaume
    Now let us examine an entry:

    jeunehom:uRavlb2TZc7fA:10009:100:Fanny JEUNEHOMME,Promo2001:/home/jeunehom:/bin/bash

    Username: jeunehom
    Password Hash: uRavlb2TZc7fA
    Permissions: 10009:100
    Name: Fanny JEUNEHOMME,Promo2001
    Home Directory: /home/jeunehom
    Logon Shell: /bin/bash

    So to crack this take a text editor and place the entire entry into it, name the file passwd.txt then go into dos and execute john with a simmilar command line to the following:

    D:\Apps\JOHN-16\RUN>john passwd.txt
    Loaded 1 password (Standard DES [48/64 4K])

    John the Ripper is now brute forcing passwd.txt to check its progress you can press space and it will come up with something like the following:

    guesses: 0 time: 0:00:00:03 (3) c/s: 37110 trying: shance1 - meter

    When John the Ripper returns you to the command prompt the passwd has been cracked, to view it do the following:

    D:\Apps\JOHN-16\RUN>john -show passwd.txt
    albert:jupiter:666:666:Section 3:/home/section3:/bin/csh

    This shows us that the user 'albert' with a password of 'jupiter' has been found.

    I hope this helps someone out.


  2. #2
    Senior Member
    Join Date
    Nov 2001
    Posts
    4,786
    john is an ok proggie, but the default wordlist sucks. get a good word list if you intend to use it and change the setting in the ini file to the name of the new list ~/newlist

    see...no flame!
    Bukhari:V3B48N826 “The Prophet said, ‘Isn’t the witness of a woman equal to half of that of a man?’ The women said, ‘Yes.’ He said, ‘This is because of the deficiency of a woman’s mind.’”

  3. #3
    Flash M0nkey
    Join Date
    Sep 2001
    Posts
    3,447
    hmmmmmm maybe there should be a selection of posts like this so when we get a "how do you hack........" type post we could just send them to the right post instead of flamming them!?

    Nah where would the fun be in that

    v_Ln

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