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Thread: Max Disk LBA - DCO Locked

  1. #1
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    Default Max Disk LBA - DCO Locked

    so realneil got me looking into SSD-Z

    this reminded me of malware that seats it self onto the hidden sectors of the disk
    using OSForensics - Hidden Disk Areas - HPA/DCO. detect and expose the hidden areas (HPA and DCO) of a hard disk. i can see there is a locked aria
    "Could not retrieve Max Disk LBA - DCO Locked"under standing this is a manufacture locked aria,
    this also being an SSD these make for a challenging data wipe
    what i want to do is the multi pass data over-wright used in programs like CCleaner

    BCWipe Total WipeOut - DoD Wipe Compliance to remove all traces of any file with BCWipe Total WipeOut - Jetico Inc. Oy - Jetico Inc. Oy
    gives a very expensive option i can not afford, nor do i trust as being sufficient
    it is mentioned both here
    linux - Harddrive - wipe out "hidden areas" like HPA and DCO also after malware infection - Super User
    and here
    Disable BIOS auto-detect hard disk settings - Chipsets - Motherboards


    i want a way to VERY securely wipe, and reformat to preferred specs the required data in these spaces
    this also needs to be considered for USB , and other plug & play which spread the malware upon plugging in

    any advice would be appreciated
    learning is good .....understanding is better .....pleas teach with wisdom............................................ ..............calemus

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    Default Re: Max Disk LBA - DCO Locked

    I have always used Wipe Drive pro from White canyon. Cost $200 and is approved by the DOD. There may be other ways of getting your hands on a copy.
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    Default Re: Max Disk LBA - DCO Locked

    $200.00

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    Default Re: Max Disk LBA - DCO Locked

    well it must be amazing at that cost
    learning is good .....understanding is better .....pleas teach with wisdom............................................ ..............calemus

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    Default Re: Max Disk LBA - DCO Locked

    I wouldn't consider that expensive all things considered. We've gotten too used to freeware and ad-based internet services. Talented developers & programmers, equipment, testing, retesting, certification, and all the time it takes to achieve a proven product don't come cheap.

    When it comes to security I'd rather pay an honest price for it and be able to trust the results. Think about the price of most professional grade programs out there and $200 doesn't seem like much in comparison.

    Well, that's my viewpoint at least.

  6. #6
    Gu3
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    Default Re: Max Disk LBA - DCO Locked

    Check out BCWipe's FAQ. They don't really support SSD's.

    There are some interesting tips on here:

    How To Securely Erase Your SSD Without Destroying It

    They do make an interesting point about Securely Wiping the drive.

    On an SSD the age old method of writing a crazy number 0's to each addressable bit on a drive won't work on an SSD, or rather it will work if you don't mind shaving the lifetime of your drive each time you do it.

    TRIM and the built in ATA Secure Erase command might be your best option.

    The article recommends Partition Magic as well. It has option to write zeroes to all blocks of the data area.

    I would caution you against doing this unless you MUST. Essentially when you do this by doing what is a full-disk write, you use up (for each time you do this) one of your limited drive writes. So if each cell has 10K writes and you do this 10 times, you now have 9990 writes left for each cell on the drive. If you did this regularly, you would take years off the lifetime of your media.

    SSD's are NOT like HDD's. Because of wear-leveling algorithms, no two writes are EVER guaranteed to go the same spot. So, realistically speaking, unless a enterprising malicious code writer finds a way to BYPASS the wear leveling mechanism and write directly to the overprovisioning space, they can't use "reserved" space to store malicious code. Doing the Partition Magic or Secure Erase solution above would be the likely obvious solution to your problem.

    Once again though, I caution you to avoid this if you can.

    Ultimately, like thumb drives, the only way to truly Securely Erase an SSD is to Smash it with a sledgehammer, or shred it.

    Frankly if you believe a thumb drive is infected, destroy it.

    Now just to make you feel all warm and safe: Equation Group (NSA) malware hides into HDD/SSD firmware

    Scott

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    Default Re: Max Disk LBA - DCO Locked

    Quote Originally Posted by calemus View Post
    well it must be amazing at that cost

    I have tested it using Forensics. Single pass -- Try to recover Data No go. DOD approved wipe ---- Try to recover Data. No chance in hell. Everything is wiped clean but drive remains usable Unless you opt for it not to be.

    I first came across Wipe Drive when I went to pay Unisys a visit in Plymouth, MI some odd years ago. All notebook or desktops required a wipe before they could be even placed on the self to start the refurb process. Since Unisys offered Leasing deals to Government entities they had to have a secure data removal process in place. Recoverable drives got the Wipe Drive treatment. Dead or obsolete drives got stuck in the degausser. Kills the controller and magnetic field on the platters rendering the drive 100% useless.


    Oh and as GU3 mentioned, becareful wiping your SSD with any of these tools until you are sure they will not cause bigger issues in the future. most of these are made for Platter drivers not ssd. I have seen enough of your post to see you are very security aware. lol Me on the hand, F*ck em all! I don't have crap worth stealing. Not like I can stop a good hacker or the FEDs if I did. They will steal my identity and return it the next day! Hell they might make my credit better by stealing it. My credit score starts with "-" and ends with "WTF?"
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  8. #8
    Gu3
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    Default Re: Max Disk LBA - DCO Locked

    Quote Originally Posted by Cyberburnout View Post
    Dead or obsolete drives got stuck in the degausser. Kills the controller and magnetic field on the platters rendering the drive 100% useless.
    Degaussers are fun. I used to work with big magnetic tapes (in a previous life), and we had a handheld (probably hand made) Degausser that we'd use on the recorder heads...lol...would probably stop a pacemaker at 100 yards. Great toy.

    S.

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    Default Re: Max Disk LBA - DCO Locked

    Quote Originally Posted by Gu3 View Post
    Degaussers are fun. I used to work with big magnetic tapes (in a previous life), and we had a handheld (probably hand made) Degausser that we'd use on the recorder heads...lol...would probably stop a pacemaker at 100 yards. Great toy.

    S.
    We had some homemade ones too that we used to remove shadow mask problems in CRT displays. We made pretty rainbows appear on the screen! lol Screw around enough and that blob of color could be permanent! hahaha
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  10. #10
    Gu3
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    Default Re: Max Disk LBA - DCO Locked

    Oooh, remember the degauss button on the back of those monstrous huge Sun Monitors? Talk about mind bending! Great rainbows!

    S.

  11. #11
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    Default Re: Max Disk LBA - DCO Locked

    Quote Originally Posted by Gu3 View Post
    Oooh, remember the degauss button on the back of those monstrous huge Sun Monitors? Talk about mind bending! Great rainbows!

    S.

    Yep and the newer(back then) had the degaus option on the OSD and did a small one automatically when you first turn it on. Cool but not as cool as the homemade one or the Sun Monitors. Those were the days lol
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