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Trojan.DNSChanger/Rootkit Agent - Can't remove!


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#1 Wigtwizzle

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Posted 14 June 2010 - 04:44 PM

Dear all

If someone could help me I would be eternally grateful!!!!

I'm having trouble removing C:\WINDOWS\system32\gxvxccounter (Trojan.DNSChanger) and HKEY_LOCAL_MACHINE\SOFTWARE\gxvxc (Rootkit.Agent).

I ran Malwarebytes and "successfully" removed them. However when i reboot the computer the problems are still there even though nothing is showing up on the scan!

After the scan I rebooted the computed in safe mode - don't know if that's not helped?

Here is the the log after I "removed" them:

Malwarebytes' Anti-Malware 1.46
www.malwarebytes.org

Database version: 4052

Windows 5.1.2600 Service Pack 3 (Safe Mode)
Internet Explorer 8.0.6001.18702

13/06/2010 18:34:19
mbam-log-2010-06-13 (18-34-19).txt

Scan type: Quick scan
Objects scanned: 133440
Time elapsed: 15 minute(s), 2 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 1
Registry Values Infected: 1
Registry Data Items Infected: 3
Folders Infected: 0
Files Infected: 1

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\gxvxc (Rootkit.Agent) -> Quarantined and deleted successfully.

Registry Values Infected:
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\microsoft windows logon process (Malware.Trace) -> Quarantined and deleted successfully.

Registry Data Items Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\AntiVirusDisableNotify (Disabled.SecurityCenter) -> Bad: (1) Good: (0) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\FirewallDisableNotify (Disabled.SecurityCenter) -> Bad: (1) Good: (0) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\NameServer (Trojan.DNSChanger) -> Data: 85.255.112.11,85.255.112.139 -> Quarantined and deleted successfully.

Folders Infected:
(No malicious items detected)

Files Infected:
C:\WINDOWS\system32\gxvxccounter (Trojan.DNSChanger) -> Quarantined and deleted successfully.






Thanks so much :thumbsup:

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#2 Budapest

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Posted 14 June 2010 - 05:00 PM

Try this:

http://www.bleepingcomputer.com/virus-remo...sing-tdsskiller
The power of accurate observation is commonly called cynicism by those who haven't got it.

—George Bernard Shaw

#3 Wigtwizzle

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Posted 15 June 2010 - 12:34 PM

I tried the tdsskiller programme and it said there were no infections. :flowers:

There must be because the problem is stil there. Malware Bytes said it had got rid of them all but the next day when i rebooted the problem had come back.

Malwarebytes says that there are no infected files but the rootkit must still be there cos it's still not working properly.

I tried to run spydoctor and unhijack this but they aborted and shut down when i started to run them - probably due to the rootkit.

I've heard before that rootkits are difficult to get rid of - I really need help with it because it's literally making me cry with frustration!!!

I just can't understand how the rootkit is still there when Malwarebytes and TDSS Killer both didn't pick anything up. Maybe Malwarebytes didn't get rid of it properly?

I'm that desperate I'll even run Combofix if I have to!

Please somebody help me............ :thumbsup:

#4 Budapest

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Posted 15 June 2010 - 04:13 PM

What exact problems are you experiencing?
The power of accurate observation is commonly called cynicism by those who haven't got it.

—George Bernard Shaw

#5 Wigtwizzle

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Posted 16 June 2010 - 09:35 AM

What exact problems are you experiencing?


It boots up on it's own without me pressing the power on button, it then shuts down all my executable files on boot up, McAfee closes down on opening. The clock is always the wrong time and the date says year 14210!

Malwarebytes detected it and apparently quarantined and deleted it but the problem came back when I rebooted. However, Malwarebytes is saying there's nothing there now even though there must be!

Thanks for any help - it is much appreciated. :thumbsup:

#6 Budapest

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Posted 16 June 2010 - 04:16 PM

Please download and scan with SUPERAntiSpyware Free
  • Double-click SUPERAntiSypware.exe and use the default settings for installation.
  • An icon will be created on your desktop. Double-click that icon to launch the program.
  • If it will not start, go to Start > All Prgrams > SUPERAntiSpyware and click on Alternate Start.
  • If asked to update the program definitions, click "Yes". If not, update the definitions before scanning by selecting "Check for Updates". (If you encounter any problems while downloading the updates, manually download them from here. Double-click on the hyperlink for Download Installer and save SASDEFINITIONS.EXE to your desktop. Then double-click on SASDEFINITIONS.EXE to install the definitions.)
  • In the Main Menu, click the Preferences... button.
  • Click the "General and Startup" tab, and under Start-up Options, make sure "Start SUPERAntiSpyware when Windows starts" box is unchecked.
  • Click the "Scanning Control" tab, and under Scanner Options, make sure the following are checked (leave all others unchecked):
    • Close browsers before scanning.
    • Scan for tracking cookies.
    • Terminate memory threats before quarantining.
  • Click the "Close" button to leave the control center screen and exit the program.
  • Do not run a scan just yet.
Reboot your computer in "Safe Mode" using the F8 method. To do this, restart your computer and after hearing your computer beep once during startup (but before the Windows icon appears) press the F8 key repeatedly. A menu will appear with several options. Use the arrow keys to navigate and select the option to run Windows in "Safe Mode".

Scan with SUPERAntiSpyware as follows:
  • Launch the program and back on the main screen, under "Scan for Harmful Software" click Scan your computer.
  • On the left, make sure you check C:\Fixed Drive.
  • On the right, under "Complete Scan", choose Perform Complete Scan and click "Next".
  • After the scan is complete, a Scan Summary box will appear with potentially harmful items that were detected. Click "OK".
  • Make sure everything has a checkmark next to it and click "Next".
  • A notification will appear that "Quarantine and Removal is Complete". Click "OK" and then click the "Finish" button to return to the main menu.
  • If asked if you want to reboot, click "Yes" and reboot normally.
  • To retrieve the removal information after reboot, launch SUPERAntispyware again.
    • Click Preferences, then click the Statistics/Logs tab.
    • Under Scanner Logs, double-click SUPERAntiSpyware Scan Log.
    • If there are several logs, click the current dated log and press View log. A text file will open in your default text editor.
    • Please copy and paste the Scan Log results in your next reply.
  • Click Close to exit the program.
If you have a problem downloading, installing or getting SAS to run, try downloading and using the SUPERAntiSpyware Portable Scanner instead. Save the randomly named file (i.e. SAS_1710895.COM) to a usb drive or CD and transfer to the infected computer. Then double-click on it to launch and scan. The file is randomly named to help keep malware from blocking the scanner.
The power of accurate observation is commonly called cynicism by those who haven't got it.

—George Bernard Shaw




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