Posessed Laptop

Discussion in 'Malware Help (A Specialist Will Reply)' started by Trestkon, Oct 26, 2012.

  1. Trestkon

    Trestkon Private E-2

    I've managed to pick up the job of repairing one of the bosses personal laptops and I'm hitting a wall in terms of what I know about malware. Vista 32 bit.

    The browser will randomly go to odd websites, and Avast (which I just installed) is continuously blocking some sort of MAL from Explorer.exe (picture attached). I'm not aware of how long ago his problems started, as I believe it's his family laptop and he doesn't use it very often.

    There's also a problem where Skype is continually blocked by Data Execution Protection. If I attempt to add an exception (which then required a restart) the exception will disappear. I'm unsure if it's related to the other issues or not.

    I've run through the removal thread and have attached my logs. Ever program ran sucessfully except for TDSSkiller which I can't get to run at all. When I try and run it (even as admin) nothing happens after I verify that I do want to run the program (I've checked, and the process isn't started).

    Any help would be most heartily appreciated!

    (MGTools logs to follow, just running it now and have to head to a meeting)
     

    Attached Files:

  2. Trestkon

    Trestkon Private E-2

    MGLogs :)
     

    Attached Files:

  3. chaslang

    chaslang MajorGeeks Admin - Master Malware Expert Staff Member

    Welcome to Major Geeks!

    Rerun Hitman Pro and allow it to fix the below infection
    Then immediately reboot your PC.


    Now run C:\MGtools\analyse.exe by double clicking on it (Note: if using Vista or Win 7, don't double click, use right click and select Run As Administrator). This is really HijackThis (select Do a system scan only) and select the following lines but DO NOT CLICK FIX until you exit all browser sessions including the one you are reading in right now:

    R3 - URLSearchHook: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - (no file)
    O2 - BHO: (no name) - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - (no file)

    After clicking Fix, exit HJT.

    Now run a new scan with RogueKiller and Hitman Pro and save logs as in original instructions and attach the new log.

    Now run the C:\MGtools\GetLogs.bat file by double clicking on it (Note: if using Vista or Win7, don't double click, use right click and select Run As Administrator).

    Then attach the below logs:
    • the new Hitman log
    • the new RogueKiller log
    • C:\MGlogs.zip
    How are things working?
     
  4. Trestkon

    Trestkon Private E-2

    Thanks for the quick response!

    I ran HMP as per your instructions and replaced

    "HitmanPro . . . . : Win32/Bootkit"

    After booting back up the computer loaded into Windows. For some reason it boots with the System Properties window open and then chokes with a BSOD about 3 seconds later.

    I'm still able to boot into safe mode (did so and fixed the two things with HijackThis) although it still boots with the System Properties window open.

    I've attached pictures of the BSOD and the System Properties window after booting into Safe Mode.
     

    Attached Files:

  5. chaslang

    chaslang MajorGeeks Admin - Master Malware Expert Staff Member

    Well I was hoping that the easy fix with Hitman would work. You had an infected partition added to your hard disk that showed in your logs. See below from two different logs, highlighted in red
    Code:
    Get Partition Info From WMI in K-bytes                          
    ==============================================================  
    Bootable  Name                   Size         Type                     
    FALSE     Disk #0, Partition #0  8381528064   Unknown                  
    FALSE     Disk #0, Partition #1  75993361920  MS-DOS V4 Huge           
    FALSE     Disk #0, Partition #2  75664350720  Installable File System  
    [B][COLOR=red]TRUE      Disk #0, Partition #3  2604544      Unknown[/COLOR][/B]  
     
     
    Partition Disk #0, Partition #0 
    Partition Size 7.81 GB (8,381,528,064 bytes) 
    Partition Starting Offset 32,256 bytes 
    Partition Disk #0, Partition #1 
    Partition Size 70.77 GB (75,993,361,920 bytes) 
    Partition Starting Offset 8,381,560,320 bytes 
    Partition Disk #0, Partition #2 
    Partition Size 70.47 GB (75,664,350,720 bytes) 
    Partition Starting Offset 84,374,922,240 bytes 
    Partition Disk #0, Partition #3 
    [COLOR=red][B]Partition Size 2.48 MB (2,604,544 bytes) [/B][/COLOR]
    [B][COLOR=red]Partition Starting Offset 160,039,272,960 bytes[/COLOR][/B]                 
    
    We will need to make a G-Parted Boot CD to remove this partition which was made active and make your real Windows partition active instead.

    Preferably from a clean computer, I need you to download: gparted-live
    Create a bootable CD for GParted. You can useImgBurn to accomplish this.
    If you need help on how to use ImgBurn, please view this guide by dr.m -- Using ImageBurn to Burn an ISO image
    Now boot off of the newly created GParted CD.
    http://img717.imageshack.us/img717/6546/gpartedsplash01107.th.png
    You should be here...
    Press ENTER
    http://img819.imageshack.us/img819/7286/gpartedkeymaps.th.png
    By default, do not touch keymap is highlighted. Leave this setting alone and just press ENTER.
    http://img404.imageshack.us/img404/9840/gpartedlanguage.th.png
    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
    http://img32.imageshack.us/img32/1122/gpartedo.th.png
    According to your logs, the partition that you want to delete is 2.48 MiB (2.48 MB)
    Click the trash can icon to delete and then click Apply.
    You should now be here confirming your actions:
    http://img233.imageshack.us/img233/1533/gpartedsteps.th.png
    Now you should be here:
    http://img696.imageshack.us/img696/8471/gpartedsuccessclose.th.png
    Is boot next to your OS drive? According to your logs, your OS drive is the 70.77 GB sized partition.
    http://img194.imageshack.us/img194/7753/gpartedboot.th.png
    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:
    http://img196.imageshack.us/img196/3483/gpartedmanageflagsboot.th.png
    Now press the Close button to save these changes.
    Now double-click the http://img822.imageshack.us/img822/641/gpartedexit.png button.
    You should receive a small pop up like this:
    http://img88.imageshack.us/img88/8986/gpartedexitreboot.png
    Choose reboot and then press OK.



    Now reboot from the Windows 7 Recovery Disc and execute the following commands:
    • bootrec /fixmbr
    • bootrec /fixboot
    • exit
    If you do not have a Windows 7 Recovery Disk then use the below to get to a command prompt and then enter those commands.



    Enter System Recovery Options from the Advanced Boot Options:
    • Restart the computer.
    • As soon as the BIOS is loaded begin tapping the F8 key until Advanced Boot Options appears.
    • Use the arrow keys to select the Repair your computer menu item.
    • Select US as the keyboard language settings, and then click Next.
    • Select the operating system you want to repair, and then click Next.
    • Select your user account an click Next.
    On the System Recovery Options menu you will get the following options:
    • Select Command Prompt
    • Then run the below commands
      • bootrec /fixmbr
      • bootrec /fixboot
      • exit
    The last one will reboot your PC. After reboot, download the current version of MGtools and save it to your root folder. Overwrite your previous MGtools.exe file with this one.

    Run MGtools.exe ( Note: If using Vista or Win7, make sure UAC is still disabled. Also don't double click on it, use right click and select Run As Administrator )

    Now attach the below log:
    • C:\MGlogs.zip
    Make sure you tell me how things are working now!
     
  6. Trestkon

    Trestkon Private E-2

    Wow, the comprehensive instructions are most appreciated!

    The smallest partition listed by GParted (2.49mb) is has an unallocated file system, which apparently makes it un-deletable (the trash is grayed out)
     
  7. chaslang

    chaslang MajorGeeks Admin - Master Malware Expert Staff Member

    Okay then just change it so that the boot flag is not set and make sure your real Windows partition does have the boot flag.
     
  8. Trestkon

    Trestkon Private E-2

    Wow, thanks for such comprehensive instructions!

    The small partition is listed as having an unallocated file type and thus is un-deletable. The OS partition is actually already set to Boot.
     
  9. chaslang

    chaslang MajorGeeks Admin - Master Malware Expert Staff Member

    You're welcome.
    Okay and is the small partition not set as bootable? If so, just continue.
     
  10. Trestkon

    Trestkon Private E-2

    Correct.

    After booting to the repair disc:

    fixmbr runs successfully

    fixboot comes up with this error:

    "The volume does not contain a recognized file system. Please make sure that all required file system drivers are loaded and that the volume is not corrupted"
     
  11. chaslang

    chaslang MajorGeeks Admin - Master Malware Expert Staff Member

    Are you sure the boot flag was set on the 70.77 GB partition and not the 70.47 GB which is not the Windows boot partition?

    Can you still boot in safe mode?
     
  12. Trestkon

    Trestkon Private E-2

    I'll doubt check, but I'm 99% sure. I can still boot in Safe Mode just fine.
     
  13. chaslang

    chaslang MajorGeeks Admin - Master Malware Expert Staff Member

    Yes please check and let me know.


    Rerun each of the below to get new logs in safe boot mode:
    • TDSSKiller
    • Hitman Pro
    • Now run the C:\MGtools\GetLogs.bat file by double clicking on it (Note: if using Vista or Win7, don't double click, use right click and select Run As Administrator).
    Then attach the below logs:
    • the new TDSSKiller log
    • the new THitman Pro log
    • C:\MGlogs.zip
     
  14. Trestkon

    Trestkon Private E-2

    I verified that the correct partition is set to boot.

    New logs are attached!

     

    Attached Files:

    Last edited: Oct 28, 2012
  15. chaslang

    chaslang MajorGeeks Admin - Master Malware Expert Staff Member

    Hmmm! Not sure what is going on here. It is confusing that you can boot in safe mode but not normal boot mode. What exactly happens when you attempt to boot in normal boot mode? Is it still the BSOD? How far do you get before the BSOD and does it give any error message?
     
  16. Trestkon

    Trestkon Private E-2

    It was indeed still the BSOD, exact same as before.

    As much as I would have liked to solve the mystery I just ended up backing up all the guys files and formatting. I appreciate all the help, though!
     
  17. chaslang

    chaslang MajorGeeks Admin - Master Malware Expert Staff Member

    Okay! Sorry we could not get it all fixed up for you.
     

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