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Trojan Horse detected at browser startup


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#1 computerupgraders

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Posted 19 February 2009 - 05:53 PM

Been through a long series of events and have so far been unable to remove this piece of malware.

Norton's 2009 says it is a "Trojan Horse" and the infected file is C:\windows\system32\gaopdxtsmyvudx.dll.

Have run Spybot, Malwarebytes and NAV but it cannot be exorcised. Everytime I open the brower it returns and NAV says it is "resolved".

Any ideas or should I post some logs of some sort?

Thanks in advance.

Edited by The weatherman, 19 February 2009 - 05:57 PM.
Moved to a more appropriate forum~TW


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#2 garmanma

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Posted 19 February 2009 - 06:37 PM

The process of cleaning your computer may require you to temporarily disable some security programs. If you are using SpyBot Search and Destroy, please refer to Note 2 at the bottom of this page.

Please download Malwarebytes Anti-Malware and save it to your desktop.
alternate download link 1
alternate download link 2
  • 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.
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.

Note 2:
-- MBAM may make changes to your registry as part of its disinfection routine. If you're using other security programs that detect registry changes (like Spybot's Teatimer), they may interfere with the fix or alert you after scanning with MBAM. Please disable such programs until disinfection is complete or permit them to allow the changes. To disable these programs, please view this topic: How To Temporarily Disable Your Anti-virus, Firewall And Anti-malware Programs
Mark
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#3 computerupgraders

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Posted 19 February 2009 - 07:06 PM

Hi Garmanma!

Thanks for the recommendation. Malwarebytes is an awesome program, I forgot to use it.

Below is the logfile for your review:

Malwarebytes' Anti-Malware 1.33
Database version: 1778
Windows 6.0.6001 Service Pack 1

2/19/2009 7:04:22 PM
mbam-log-2009-02-19 (19-04-22).txt

Scan type: Quick Scan
Objects scanned: 56828
Time elapsed: 2 minute(s), 33 second(s)

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

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
HKEY_CLASSES_ROOT\videoplay (Trojan.DNSChanger) -> Quarantined and deleted successfully.

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
C:\Windows\System32\drivers\gaopdxsxkbntdn.sys (Trojan.Agent) -> Quarantined and deleted successfully.



I will reboot and see how it goes.

#4 computerupgraders

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Posted 19 February 2009 - 08:03 PM

Hi Mark,

Great news, that got it.

Many thanks for your help.

#5 garmanma

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Posted 20 February 2009 - 05:50 PM

Just to make sure

Please update mbam and select FULL Scan
Run the scan, Remove selected and reboot
Post the log for review
Mark
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why won't my laptop work?

Having grandkids is God's way of giving you a 2nd chance because you were too busy working your butt off the 1st time around
Do not send me PMs with problems that should be posted in the forums. Keep it in the forums, so everyone benefits
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