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Windows XP Encrypting File System (EFS) - Cracking the encryption

  • 28-11-2006 8:48pm
    #1
    Sully
    Moderators, Education Moderators, Technology & Internet Moderators, Regional South East Moderators Posts: 24,056 Mod ✭✭✭✭


    Hey,

    Does anyone know how to crack the WinXP Encrypting File System (EFS)? I have an MSWord file that is encrypted, and so I cant open it. Just wondering is there any way of decoding it and retrieving the contents?

    Hope someone can help..

    Cheers.


Comments

  • #2
    StickyMcGinty
    Registered Users, Registered Users 2 Posts: 2,835 ✭✭✭StickyMcGinty


    HERE

    dont tell me you didnt google it!


  • #3
    feylya
    Moderators, Music Moderators Posts: 23,363 Mod ✭✭✭✭feylya


    Or copying it to a fat32 partition should sort it.


  • #4
    the_syco
    Registered Users, Registered Users 2 Posts: 37,315 ✭✭✭✭the_syco


    Found the products from www.elcomsoft.com to be very good, esp as it got a password that had numbers, higher and lower case letters, in just under 20 seconds from an Excel file.


  • #5
    StickyMcGinty
    Registered Users, Registered Users 2 Posts: 2,835 ✭✭✭StickyMcGinty


    feylya wrote:
    Or copying it to a fat32 partition should sort it.

    your joking? will that do the job?


  • #6
    feylya
    Moderators, Music Moderators Posts: 23,363 Mod ✭✭✭✭feylya


    It might only be if you're the owner of the file but anytime I copy from NTFS, it warns me about loosing encryption.


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  • #7
    the_syco
    Registered Users, Registered Users 2 Posts: 37,315 ✭✭✭✭the_syco


    feylya wrote:
    It might only be if you're the owner of the file but anytime I copy from NTFS, it warns me about loosing encryption.
    Aye, FAT32 doesn't do ancryption. The site I gave is good at cracking the passwords. Depends what encryption you mean: Windows Encryption, or password encryption.


  • #8
    Sully
    Moderators, Education Moderators, Technology & Internet Moderators, Regional South East Moderators Posts: 24,056 Mod ✭✭✭✭Sully


    Its an RTF file and MSWord cant open it. Its just over 2MB in size.

    If I rename to a text file, I can see some of the contents of the file but not all. The rest is all numbers then F0 repeatedly. Theres also back slashes with numbers/words after it..

    Im assuming this is encrypted and a Google came up with the WinXP Encryption. The link to http://www.crackpassword.com/products/prs/mswin/efs/ offers a product which seems to want the original username / password it was encoded in. I tried giving it random user/pass but it didnt seem to work..


  • #9
    SouperComputer
    Registered Users, Registered Users 2 Posts: 6,946 ✭✭✭SouperComputer


    feylya wrote:
    It might only be if you're the owner of the file but anytime I copy from NTFS, it warns me about loosing encryption.

    This only works if you are logged into the OS that holds the encrypion key or if you reinstall and have a backup of the key on disk.


  • #10
    ressem
    Registered Users, Registered Users 2 Posts: 2,426 ✭✭✭ressem


    Doesn't sound like it's encrypted, certainly not with efs. What you describe is how rtf markup usually looks. More likely that large portions of the file are images or other data, like Unicode. Is it a document off the net that we could check for you?

    Have you tried renaming it with a .rtf extension and opening in wordpad or openoffice?


  • #11
    Sully
    Moderators, Education Moderators, Technology & Internet Moderators, Regional South East Moderators Posts: 24,056 Mod ✭✭✭✭Sully


    Opened it in WordPad and got contents. Strange the RTF wouldnt open..

    Copied it to FAT32 partion - still wouldnt open!


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