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Removing Trojan:DOS/Alureon.E from Win 7 Pro

Discussion in 'Malware Help - MG (A Specialist Will Reply)' started by Anubis185, Dec 7, 2011.

  1. Anubis185

    Anubis185 Private E-2

    There is a very similiar post to mine but unfortunately, no resolution was received that I could find. I have a desktop (not name brand, built by a local IT contractor) which had an infection. At the time (about a week ago) it was running XP and lost all desktop icons and Explorer showed no files or folders.

    I formatted and installed Windows 7 Pro this afternoon and as soon as I turned on Microsoft Security Essentials (of course, after I had reinstalled everything including all programs and drivers) it alerted me to a threat which was identified as Trojan:DOS/Alureon.E. I received the following error when I attempted to repair it:

    Error code 0x8000704ec. This program is blocked by group policy. For more information contact your system administrator.

    I have run TDSS Killer, MBR Check and MGtools (logs attached). The TDSS item that was found during the TDSS Killer scan did not give me the option to cure, only delete, quarantine, or skip.

    Any help that you can provide would be greatly appreciated!

    Attached Files:

  2. thisisu

    thisisu Malware Consultant

    Hi and welcome to Major Geeks, Anubis185!

    FALSE     Disk #0, Partition #1  2604544       Unknown   
    Partition	Disk #0, Partition #1	
    Partition Size	2.48 MB (2,604,544 bytes)
    This is a bad partition that runs tasks from one of the latest TDL4 rootkits. Do you have your Windows 7 DVD incase we need to get into a Windows Recovery Environment to solve any potential booting issues you may experience after removing the above partition?

    It is also recommended that you back up any data if you haven't already just in case I am unable to get the system to boot again.

    Let me know before we proceed.
    Last edited: Dec 8, 2011
  3. Anubis185

    Anubis185 Private E-2

    I do have my Windows 7 DVD handy; additionally, this is a clean install so nothing has to be backed up. I am ready to proceed.
  4. thisisu

    thisisu Malware Consultant

    Preferably from a clean computer, I need you to download: gparted-live-0.10.0-3.iso (115.1 MB)

    Create the bootable CD for Gparted. You can use ImgBurn do this.

    Now boot off of the newly created Gparted CD.

    You should be here...
    Press ENTER

    By default, "do not touch keymap" is highlighted. Leave this setting alone and just press ENTER.

    Choose your language and press ENTER. English is default [33]

    Once again, at this prompt, press ENTER

    You will now be taken to the main GUI screen below
    According to your logs, the partition that you want to delete is 2.48 MB
    Click the trash can icon to delete and then click Apply.

    You should now be here confirming your actions:

    Now you should be here:

    Is "boot" next to your OS drive? According to your logs, the Operating System (OS) drive is 465.75 GB

    If "boot" is not next to your OS drive under "Flags", right-mouse click the OS drive while in Gparted and select Manage Flags

    In the menu that pops up, place a checkmark in boot like the picture below:

    Now double-click the [​IMG] button.

    You should receive a small pop up like this:
    Choose reboot and then press OK.

    Boot back into Windows and let me know how things are running now.
  5. Anubis185

    Anubis185 Private E-2

    Sir, you are a gentleman and a scholar. It appears as though the issue has been resolved with no loss of data. I appreciate it greatly!
  6. thisisu

    thisisu Malware Consultant

    Good job :)

    18:00:23.0578 8384	\Device\Harddisk0\DR0 ( TDSS File System ) - skipped by user
    18:00:23.0578 8384	\Device\Harddisk0\DR0 ( TDSS File System ) - User select action: Skip 
    Rerun TDSSKiller and if it still detects this, allow TDSSKiller to delete it.
  7. thisisu

    thisisu Malware Consultant

    The rest of your logs are clean.

    If you are not having any other malware problems, it is time to do our final steps:
    1. We recommend you keep SUPERAntiSpyware and Malwarebytes Anti-Malware for scanning/removal of malware. Unless you purchase them, they provide no protection. They do not use any significant amount of resources ( except a little disk space ) until you run a scan.
    2. If we had you use ComboFix, uninstall ComboFix (This uninstall will only work as written if you installed ComboFix on your Desktop like we requested.)
      • Click START then RUN and enter the below into the run box and then click OK. Note the quotes are required
      • "%userprofile%\Desktop\combofix" /uninstall
        • Notes: The space between the combofix" and the /uninstall, it must be there.
        • This will uninstall ComboFix and also reset hidden files and folders settings back to Windows defaults.
    3. Go back to step 6 of the READ ME and renable your Disk Emulation software with Defogger if you had disabled it.
    4. Any other miscellaneous tools we may have had you install or download can be uninstalled and deleted.
    5. If we had you download any registry patches like fixme.reg or fixWLK.reg (or any others), you can delete these files now.
    6. If running Vista, it is time to make sure you have reenabled UAC by double clicking on the C:\MGtools\enableUAC.reg file and allowing it to be added to the registry.
    7. Go to add/remove programs and uninstall HijackThis if it present
    8. Goto the C:\MGtools folder and find the MGclean.bat file. Double click on this file to run this cleanup program that will remove files and folders
      related to MGtools and some other items from our cleaning procedures.
    9. If you are running Win 7, Vista, Windows XP or Windows ME, do the below:
      • Refer to the cleaning procedures pointed to by step 7 of the READ ME
        for your Window version and see the instructions to Disable System Restore which will flush your Restore Points.
      • Then reboot and Enable System Restore to create a new clean Restore Point.
    10. After doing the above, you should work through the below link:

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