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Rootkit on computer running windows XP x64 edition


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#1 Jon_ls

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Posted 01 March 2009 - 08:51 PM

Hello. I hope someone might be able to help me. I have an intel computer running Windows XP x64 edition. My anti-virus program, AVG Internet Security says that I have a rootkit. When I run it's anti-rootkit scan, it has a positive result and this is what it says:

"C:\WINDOWS\System32\Drivers\amgxjqnv.SYS";"Hidden driver"

The program has an option to remove the malware (requiring a restart), but it isn't able to because after the restart the rootkit will still be there but the infected file might have a differnet name (this time it's amgxjqnv.SYS but the first part of the name will be something different than "amgxyjqnv").

As far as I can tell, the computer doesn't have any obvious problems except for a bizarre problem with the task manager. The top part of the tast manager window has been removed. But this I mean the top section of the window containing the name of the window and the file menu and the little icons to close or minimize the window is gone. Once the task manager is used it can't be closed and stays open unless the computer is restarted. Also, whenever it's right-clicked ion the task bar a context menu doesn't open either (no option to minimize it that way either). And so there's no way to view the running processes in the task mananger, just the current applications opened. I believe this started a week or two ago.


I can't find any third-party programs that will work on this type of problem on the 64-bit edition of windows, and so I don't know what I should do. Any help would be appreciated. Thank you.

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#2 DaChew

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Posted 01 March 2009 - 09:22 PM

Let me research this a bit.

In the meantime run MBAM

Please download Malwarebytes Anti-Malware (v1.34) and save it to your desktop.
alternate download link 1
alternate download link 2
If you have a previous version of MBAM, remove it via Add/Remove Programs and download a fresh copy.
  • Make sure you are connected to the Internet.
  • Double-click on mbam-setup.exe to install the application.
  • When the installation begins, follow the prompts and do not make any changes to default settings.
  • When installation has finished, make sure you leave both of these checked:
    • Update Malwarebytes' Anti-Malware
    • Launch Malwarebytes' Anti-Malware
  • Then click Finish.
MBAM will automatically start and you will be asked to update the program before performing a scan.
  • If an update is found, the program will automatically update itself.
  • Press the OK button to close that box and continue.
  • If you encounter any problems while downloading the updates, manually download them from here and just double-click on mbam-rules.exe to install. Alternatively, you can update through MBAM's interface from a clean computer, copy the definitions (rules.ref) located in C:\Documents and Settings\All Users\Application Data\Malwarebytes\Malwarebytes' Anti-Malware from that system to a usb stick or CD and then copy it to the infected machine.
On the Scanner tab:
  • Make sure the "Perform Quick Scan" option is selected.
  • Then click on the Scan button.
  • If asked to select the drives to scan, leave all the drives selected and click on the Start Scan button.
  • The scan will begin and "Scan in progress" will show at the top. It may take some time to complete so please be patient.
  • When the scan is finished, a message box will say "The scan completed successfully. Click 'Show Results' to display all objects found".
  • Click OK to close the message box and continue with the removal process.
Back at the main Scanner screen:
  • Click on the Show Results button to see a list of any malware that was found.
  • Make sure that everything is checked, and click Remove Selected.
  • When removal is completed, a log report will open in Notepad.
  • The log is automatically saved and can be viewed by clicking the Logs tab in MBAM.
  • Copy and paste the contents of that report in your next reply and exit MBAM.
Note: If MBAM encounters a file that is difficult to remove, you may be asked to reboot your computer so it can proceed with the disinfection process. Regardless if prompted to restart the computer or not, please do so immediately. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware. MBAM may "make changes to your registry" as part of its disinfection routine. If using other security programs that detect registry changes (ie Spybot's Teatimer), they may interfere or alert you after scanning with MBAM. Please temporarily disable such programs or permit them to allow the changes.

http://www.bleepingcomputer.com/forums/t/114351/how-to-temporarily-disable-your-anti-virus-firewall-and-anti-malware-programs/

Edited by DaChew, 01 March 2009 - 09:23 PM.

Chewy

No. Try not. Do... or do not. There is no try.

#3 Jon_ls

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Posted 01 March 2009 - 09:52 PM

Okay. The program found 1 malicious item and had to restart. Here is the log:


Malwarebytes' Anti-Malware 1.34
Database version: 1814
Windows 5.2.3790 Service Pack 2

3/1/2009 8:38:57 PM
mbam-log-2009-03-01 (20-38-57).txt

Scan type: Quick Scan
Objects scanned: 71153
Time elapsed: 2 minute(s), 4 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 1
Folders Infected: 0
Files Infected: 0

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoActiveDesktopChanges (Hijack.DisplayProperties) -> Bad: (1) Good: (0) -> Quarantined and deleted successfully.

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)

#4 DaChew

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Posted 01 March 2009 - 11:31 PM

http://www.kaspersky.com/kos/eng/partner/2...n=1235968116953

I am not finding anything about rootkits infecting 64 bit OS's
Chewy

No. Try not. Do... or do not. There is no try.




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