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Infected with 6to4svc.dll


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5 replies to this topic

#1 Onyt

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Posted 31 July 2009 - 04:14 PM

Hello Bleeping Computer,

I have unfortunately been infected with a trojan after visting the world of raids site which had been compromised a couple of days back. I have scanned with McAfee and it picks up the trojan as Generic Downloader.x!lv. The site says to look for 6to4svc.dll and it does appear in my system32 files. Any help you can offer to remove this problem would be greatly appreciated.


Many thanks in advance

BC AdBot (Login to Remove)

 


#2 boopme

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Posted 31 July 2009 - 06:59 PM

Hello threat Expert finds that file to be safe. You may have already removed the other harmful file.

.File "6to4svc.dll" has the following statistics:
Total number of reports analysed 524,597
Number of cases that involved the file "6to4svc.dll" 79
Number of incidents when this file was found to be a threat 0
Statistical volume of cases when "6to4svc.dll" was a threat 0%



To be sure nothing else is next.
Next run MBAM (MalwareBytes):

NOTE: Before saving MBAM please rename it to zztoy.exe....now save it to your desktop.

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

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. Temporarily disable such programs or permit them to allow the changes.
  • 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 definition 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. Be sure to post the complete log to include the top portion which shows MBAM's database version and your operating system.
  • Exit MBAM when done.
Note: If MBAM encounters a file that is difficult to remove, you will be asked to reboot your computer so MBAM can proceed with the disinfection process. If asked to restart the computer, please do so immediately. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware.
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#3 Onyt

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Posted 01 August 2009 - 02:54 AM

Thankyou for your help that seems to off cleaned it off the system. Please find the log below:

Malwarebytes' Anti-Malware 1.39
Database version: 2539
Windows 5.1.2600 Service Pack 3

01/08/2009 08:48:20
mbam-log-2009-08-01 (08-48-20).txt

Scan type: Quick Scan
Objects scanned: 86512
Time elapsed: 3 minute(s), 35 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 1
Registry Keys Infected: 3
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:
c:\WINDOWS\system32\6to4ex.dll (Spyware.Agent) -> Delete on reboot.

Registry Keys Infected:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\6to4 (Spyware.Agent) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet003\Services\6to4 (Spyware.Agent) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\6to4 (Spyware.Agent) -> 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\6to4ex.dll (Spyware.Agent) -> Delete on reboot.

#4 boopme

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Posted 01 August 2009 - 09:29 AM

OK, great! If all is good there then.....
Now you should Create a New Restore Point to prevent possible reinfection from an old one. Some of the malware you picked up could have been backed up, renamed and saved in System Restore. Since this is a protected directory your tools cannot access to delete these files, they sometimes can reinfect your system if you accidentally use an old restore point. Setting a new restore point AFTER cleaning your system will help prevent this and enable your computer to "roll-back" to a clean working state.

The easiest and safest way to do this is:
  • Go to Start > Programs > Accessories > System Tools and click "System Restore".
  • Choose the radio button marked "Create a Restore Point" on the first screen then click "Next". Give the R.P. a name, then click "Create". The new point will be stamped with the current date and time. Keep a log of this so you can find it easily should you need to use System Restore.
  • Then use Disk Cleanup to remove all but the most recently created Restore Point.
  • Go to Start > Run and type: Cleanmgr
  • Click "Ok". Disk Cleanup will scan your files for several minutes, then open.
  • Click the "More Options" tab, then click the "Clean up" button under System Restore.
  • Click Ok. You will be prompted with "Are you sure you want to delete all but the most recent restore point?"
  • Click Yes, then click Ok.
  • Click Yes again when prompted with "Are you sure you want to perform these actions?"
  • Disk Cleanup will remove the files and close automatically.
Vista Users can refer to these links: Create a New Restore Point and Disk Cleanup.
How do I get help? Who is helping me?For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear....Become a BleepingComputer fan: Facebook

#5 Onyt

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Posted 01 August 2009 - 01:29 PM

New restore point created. Many thanks for your help :thumbsup:

#6 boopme

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Posted 02 August 2009 - 02:36 PM

You're most welcome, please take a moment to read quietman7's excellent prevention tips in post 17 here
Click>>Tips to protect yourself against malware and reduce the potential for re-infection:
How do I get help? Who is helping me?For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear....Become a BleepingComputer fan: Facebook




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