Aug 16 2007

Cracking Windows Passwords

_lock It seems like many people are in need of resetting or cracking forgotten passwords lately so I decided to find a good Password Cracking program. After trying out a few I like Ophcrack live CD the best for passwords under 14 characters.

Ophcrack is a Windows password cracker based on rainbow tables. It is a very efficient implementation of rainbow tables done by the inventors of the method. It comes with a GTK+ Graphical User Interface and runs on Windows, Mac OS X (Intel CPU) as well as on Linux.

Get the live CD Here, then burn the .ISO file to a CD Click here for a good burning program

Now restart your computer and boot from the Live CD.


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When Ophcrack finishing booting you will be presented with a list of all of the accounts on the computer. Then click Launch to start the program.

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Depending on the difficulty of your password it could take a few seconds to a couple minutes. Then right down the password remove the CD and reboot back into Windows and enter your password.

Then create a password reset disk for the next time.

Update 1-15-08 For everyone having problems with Ophcrack Check out Offline NT Password Editor. Below

Crack Windows Passwords with Offline NT Password Editor

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    28 Comments on this post

    Trackbacks

    1. Vista Revisited - » Reset A Lost Vista Login Password wrote:

      […] Cracking Windows Passwords […]

      August 16th, 2007 at 9:30 pm
    2. Vista Revisited - » Create A Vista Password Reset Disk wrote:

      […] Cracking Windows Passwords […]

      August 17th, 2007 at 11:46 am
    3. Reset/crack a forgotten Windows logon password | PC Memoirs wrote:

      […] that are able to crack passwords, but I have used only one successfully – Ophcrack (thanks to Vista Revisited). Ophcrack is a Windows password cracker based on rainbow tables. It is one of the best programs […]

      January 2nd, 2009 at 7:36 am
    1. Wahoo said:

      Thank you for sharing!

      October 7th, 2007 at 12:51 am
    2. yasar said:

      hey hi
      i had used this but i m unable to get my password as it shows nthash to be used
      how i m going to use this nthash table as it say all lmhashs are empty
      plz suggest
      regards
      yasar

      November 6th, 2007 at 3:14 pm
    3. Kevin said:

      @ yasar, Is your password over 14 characters? I’m not sure why your having problems. You may want to check out the Ophcrack forums at
      http://sourceforge.net/forum/forum.php?forum_id=458244
      They may be able to help you more here.
      http://ophcrack.sourceforge.net/faq.php

      November 6th, 2007 at 7:44 pm
    4. jen said:

      (As I’m finding out) ror Vista, you have to use the NTHASH tables, which are not included for free with Ophcrack.

      I see the table is available to purchase for $240 from Objectif S?curit? (www.objectif-securite.ch).

      I’d love to find a free version of the NTHASH tables, or someone who can provide a 1-time use service for it.

      j

      December 6th, 2007 at 12:13 pm
    5. Saaid said:

      im having the same problem..i have windows vista and it sayz. “all Lm hashes are empty, please use NThash tables to crack remaining hashes”. any other suggestionz?

      January 3rd, 2008 at 1:43 am
    6. Ant said:

      How log is this supposed to take I get stuck at the floppy drive part

      Floppy drive(s):fd0 is .44M

      Although this laptop has no floppy drive

      January 3rd, 2008 at 3:36 am
    7. Kevin said:

      @ Saaid, I’m not sure why your having those problems but try http://sourceforge.net/forum/forum.php?thread_id=1647618&forum_id=458244
      they might be able to provide more help for you.
      Kevin

      January 3rd, 2008 at 6:23 pm
    8. Kevin said:

      @ Ant, I?m not sure why your having problems. the last time I tried it it only took about 20 minutes to crack.You may want to check out the Ophcrack forums at
      http://sourceforge.net/forum/forum.php?forum_id=458244
      They may be able to help you more here.
      http://ophcrack.sourceforge.net/faq.php
      Mabe they can be of more help. sorry.
      Kevin

      January 3rd, 2008 at 6:36 pm
    9. kevin said:

      ophcrack dosent work with windows vista does anyone know of an alternative program for vista

      February 21st, 2008 at 11:42 pm
    10. Kevin said:
      February 22nd, 2008 at 6:15 am
    11. answers said:

      Guys,

      I was facing the ?All Lm hashes are empty, please use NThash tables to crack the remaining hashes? problem.

      This post details what I did to get the password on my Vista machine: http://www.slists.com/techytrends//mvnforum/viewthread?thread=322

      Worked for me.

      April 22nd, 2008 at 4:48 pm
    12. Kevin said:

      @ answers that Offline NT Password & Registry Editor rocks, it works every time.

      April 23rd, 2008 at 12:55 pm
    13. laptop repairs said:

      It took too long to download. Do you have smaller software?

      September 2nd, 2008 at 6:29 pm
    14. Kevin said:
      September 2nd, 2008 at 9:50 pm
    15. lineza said:

      i found a vista cracking video in this webpage.
      http://www.degisik.org/2008/10/20/unutulan-vista-sifresi-nasil-kirilir/

      November 25th, 2008 at 7:24 pm
    16. Gurmit Singh said:

      I have no words to thank you for this valuable CD. it worked like a charm.

      May 23rd, 2009 at 1:53 pm
    17. Kevin said:

      @ Gurmit, Thanks for visiting.

      Kevin.

      May 24th, 2009 at 7:31 pm
    18. harsh gola said:

      we can say nothing is impossible

      March 1st, 2011 at 8:57 am
    19. Robin said:

      any suggestions for a password that is 16 characters long?

      August 17th, 2011 at 5:35 pm
    20. Winrar Free said:

      I used to read you blog frequently, I can’t believe I ever stopped! Now I remember what got me enamored hooked overall.

      December 30th, 2012 at 6:08 pm
    21. http://wiki-naturba.totemnumerique.com said:

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      Outstanding blog and amazing style and design.

      April 23rd, 2013 at 4:21 am
    22. internet marketing consulting said:

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      April 25th, 2013 at 6:14 pm
    23. Maximilian said:

      Your way of explaining everything in this post is really good, every one can without difficulty be aware of it, Thanks a lot.

      July 7th, 2013 at 8:30 am
    24. 6 sigma said:

      Heya! I just wanted to ask if you ever have any issues with
      hackers? My last blog (wordpress) was hacked and I ended
      up losing a few months of hard work due to no back up.
      Do you have any methods to prevent hackers?

      February 11th, 2014 at 4:07 am
    25. Kevin said:

      Use strong passwords and keep plugins updated.

      February 12th, 2014 at 9:18 am

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