Re: Encrypted vs file permissions etc.

From: DJ Borell (dborell_at_techmedix.com)
Date: 02/04/05


Date: Fri, 4 Feb 2005 01:54:30 -0500

Your files were encrypted with EFS. There are only two ways to recover the
files:

1) Use an EFS Recovery agent. This is the person, the administrator on a
computer not part of a domain, that can decrypt files (other than their
own.) Unless you're system was part of a domain, this is not an option for
you as your system now has a new certificate and a new EFS Recovery Agent -
that being, the new admin account. The new certificate is not compatible
with your old certificate and, thus, cannot be used to decrypt your files.

2) Attempt to find "hacking" software that will decrypt EFS encrypted files.
Pretty unlikely. I know of no programs that can do this, and, to be honest,
if I did, I probably wouldn't tell you about them (sorry.)

Having said that, you probably get the idea that your files are pretty well
unrecoverable. A last option would be to take your drive to a data recovery
service. EFS is crackable, but you will definitely pay for it.

The best advice I can give you at this point is planning. If you're going
to use EFS, ALWAYS maintain a backup copy of your certificate separate from
your HD. On a floppy (stored securely under lock and key) is a good place.

"MICROSOFT" <nobody@devnull.spamcop.net> wrote in message
news:O$SHJ7kCFHA.3324@TK2MSFTNGP15.phx.gbl...
> Hi,
>
> Problem: Cannot unzip or open ANY encrypted files stored on my external
> USB-2 160 Gig hard drive, an ACOM.
>
> XP Pro, SP2/hot fixed, 512 ram, two 80 Gig drvs, non-RAID etc., ext USB
> 160 Gig drive
> XP just reinstalled - deleted partition, format, etc. etc..
> Have Norton av & firewall working, no spyware yet, popup blocking on.
>
> Problem:
> External USB drive:
> Inadvertantly clicked Encrypt, and thus encrypted the contents. Forgot
> that happened UNTIL I needed the backups on it. Long story short, I
> managed to trash the C drive drastically and after two days, figured
> reinstalling would be faster since I have good backups of everything.
> That external drive has ALL my most recent archives; full backup and one
> incremental.
> Archives were created with WinZip, for easy manipulation, restoration of
> files, easy compares, etc. for future work. Turns out there ain't much
> future in it after all <g>!!! Anyway,
>
> AFTER the XP re-install, I got file or security permission errors when I
> tried to unzip any of the files. I ass-u-me since XP wasa reinstalled, it
> thinks I'm not the owner? Anyway, working on that premise, I have
> succeeded in:
> -- Taking ownership of the Folders. Folders no longer indicate encrypted
> (green color default font).
> But, I cannot figure out any way to take ownership (if that's the problem)
> of the files.
>
> I can:
> -- Copy, delete, change r, a, h, s attributes and Restore from the
> Recycle Bin for the files on that drive.
> -- I can NOT copy them to any DIFFERENT drives. Nothing which involves
> opening of the files can succeed. When I click Properties for any of the
> encrypted files, then Advanced, and clear the check mark on Encrypt Files,
> Apply, I get the error message in a dialog box:
> -----------------
> An error occurred applying attributes to the file
> Path\fname
> Access is Denied.
> -------------------
> Options are to Ignore, Ignore All, Retry, or quit. Retry fails of course.
> Ignore simply finished the windows up and closes them. Next time the
> window is opened, the check mark for Encrypt Files is still there.
>
> I had a couple of MVP articles saved on another archive CD on how to
> retake ownership and set permissions on files, so I tried those, but I'm
> too ignorant of the processes to be sure of what I've done/am doing. That
> article allowed me to take over the folers and get rid of the R attribute,
> but not to get rid of the Encrypted attribute.
> Not sure whether it was XP or WinZip that did the original encryption,
> though. WinZip gets essentially the same error message only shorter; I'm
> not allowed to access that file. Can get the exact wording if needed.
>
> Just for grins, I took the drive to my XP laptop and checked it there:
> Same results. No access allowed.
>
> I've tried working from the DOS prompt, Safe Mode, and taking over the
> files every way I can think of, but like I said, I'm pretty ignorant
> around these things.
> My own Admin account, AND the system undeleteable Admin accout, both
> have Full Control now; I"ve gone thru the processes and Help files several
> times.
> The only permission I dont' have, and can't figure out how to get, OR
> what it is, is "Special Permissions". I haven't looked for its meaning
> yet, but I could find nothing in the groups, user, admin, etc., policies
> or anywhere to set it for myself. It's not set for any account that I can
> see, and I've looked at all of them.
>
> -- What are the Special Permission?
> -- How can I get access to those files at least temoprarily so that I can
> unzip them or copy them to the internal hard drives where I can unsip
> them.?
>
> Any assistance or useful comments would be most appreciated. I'm out of
> options and starting to grab at straws at this point.
>
> If the suggestion were to reinstall XP again that wouldn't be bad either;
> the system drive is pretty well virgin anyway, so no big deal.
>
> Thanks in Advance for your assistance and advice,
>
> Pop
>
>
>
>
>



Relevant Pages

  • Re: Encrypted vs file permissions etc.
    ... Your files were encrypted with EFS. ... Use an EFS Recovery agent. ... > Inadvertantly clicked Encrypt, ... > unzip them or copy them to the internal hard drives where I can unsip ...
    (microsoft.public.windowsxp.security_admin)
  • Re: Help Me to prevent crack my admin Password
    ... You can't use EFS to encrypt the current system directory. ... >> remove the floppy drive as well as any other drives such as CD or DVD ... >>> fellows is loging in as my administrator login and he is ...
    (microsoft.public.windowsxp.security_admin)
  • Re: Need help unencrypting files after computer exploded
    ... so then one day my mother board caught on fire, ... i was able to salvage my hard drives from it. ... there is some kind of magic way i can un-encrypt or retrieve a efs ... gets all the bits from to encrypt the certificate. ...
    (microsoft.public.windowsxp.security_admin)
  • RE: Laptop Security - Microsoft EFS
    ... With EFS the keyare unique to the drive. ... EFS to encrypt system files. ... cleartext during a mount attack, but the easiest way for an attacker to gain ... who can also decrypt the respective persons info. ...
    (Security-Basics)
  • RE: EFS rollout using Active Directory
    ... I just have something to add to the Final Thought regarding laptop users: ... You can implement EFS on systems running Windows 2000 and Windows XP ... Stand-alone workstations generate their own public key certificate that you ... encrypt the contents of their files or folders. ...
    (Focus-Microsoft)

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