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Removing w32.virut.cf virus

I have w32.virut.cf virus on my Windows XP Pro SP2 with Norton AntiVirus 2007 updated fully.It has blocked access to all major antivirus providers' websites like Symantec, McAfee, etc.I am able to access other websites.Also, I get continous messages from Norton saying an 'attempt to attack your PC was blocked'.When I see the details, it has something like this:

Risk Name:HTTP Trojan ZBot Domain
Risk Level:High
Attacking Computer:SMARTPC(192.168.1.5, 3105)[this is my own comp's name]
Destination Address:lometr.pl(211.95.79.6, 80)
Traffic Description: TCP, 3105

Sometimes the attacking computer and destination are vice-versa.I also get a second intrusion attempt detail with the risk name HTTP Malicious PDF Request with attacking computer lometr.pl
Also, the virus has damaged my system files.But I tried to check the stability of my system by running the scannow windows tool and it said all files are intact.When I right-click on My Computer and 'Properties', I get an error saying Windows cannot find C:\WXPOS\system32\rundll32.exe

I intend to fix this without having to format my PC.Please help.Your solutions will be highly appreciated.

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  • ameya_smarty Jul 31, 2009

    Hmm....after putting all of my PC knowledge to use (and of many other netizens also), I did what was the last resort-format.Can't help it, but I must say that the person making this virus has to be damn smart.He hasn't kept even a single way out..once you are infected, you're finished.The PC mortality rate is 100% here....that person should be whacked in public and sentenced to 9-10 years jail for this ****.

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Virut damages so many .exe files you can't seemingly remove it. I finished up reformatting and reinstalling all my software! Except one was on a hard drive so I reinstalled the virus... doh! Back to the beginning.
It also destroyed winlogon files, winnit and even humble little notepad! Regedit went, so did word, IE6, Photoshop, Nikon ViewNX, etc. My virus software was helpless.
Howard

Posted on Jul 29, 2009

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Try the free version of Malwarebytes
If you have issues installing it, try renaming the file and then renaming the main .exe after it's installed. Some viruses and trojans can recognize the file name and prevent it from installing/running. Also try safe mode to install and run a full scan.

Posted on Jul 14, 2009

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Posted on Jan 02, 2017

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The following instructions pertain to all current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines.
  1. Disable System Restore (Windows Me/XP).
  2. Update the virus definitions.
  3. Run a full system scan.
  4. Delete any values added to the registry.

For specific details on each of these steps, read the following instructions.

1. To disable System Restore (Windows Me/XP)
If you are running Windows Me or Windows XP, we recommend that you temporarily turn off System Restore. Windows Me/XP uses this feature, which is enabled by default, to restore the files on your computer in case they become damaged. If a virus, worm, or Trojan infects a computer, System Restore may back up the virus, worm, or Trojan on the computer.

Windows prevents outside programs, including antivirus programs, from modifying System Restore. Therefore, antivirus programs or tools cannot remove threats in the System Restore folder. As a result, System Restore has the potential of restoring an infected file on your computer, even after you have cleaned the infected files from all the other locations.

Also, a virus scan may detect a threat in the System Restore folder even though you have removed the threat.

For instructions on how to turn off System Restore, read your Windows documentation, or one of the following articles:

Note: When you are completely finished with the removal procedure and are satisfied that the threat has been removed, reenable System Restore by following the instructions in the aforementioned documents.

For additional information, and an alternative to disabling Windows Me System Restore, see the Microsoft Knowledge Base article: Antivirus Tools Cannot Clean Infected Files in the _Restore Folder (Article ID: Q263455).

2. To update the virus definitions
Symantec Security Response fully tests all the virus definitions for quality assurance before they are posted to our servers. There are two ways to obtain the most recent virus definitions:
  • Running LiveUpdate, which is the easiest way to obtain virus definitions.

    If you use Norton AntiVirus 2006, Symantec AntiVirus Corporate Edition 10.0, or newer products, LiveUpdate definitions are updated daily. These products include newer technology.

    If you use Norton AntiVirus 2005, Symantec AntiVirus Corporate Edition 9.0, or earlier products, LiveUpdate definitions are updated weekly. The exception is major outbreaks, when definitions are updated more often.


  • Downloading the definitions using the Intelligent Updater: The Intelligent Updater virus definitions are posted daily. You should download the definitions from the Symantec Security Response Web site and manually install them.

The latest Intelligent Updater virus definitions can be obtained here: Intelligent Updater virus definitions. For detailed instructions read the document: How to update virus definition files using the Intelligent Updater.

3. To run a full system scan
  1. Start your Symantec antivirus program and make sure that it is configured to scan all the files.

    For Norton AntiVirus consumer products: Read the document: How to configure Norton AntiVirus to scan all files.

    For Symantec AntiVirus Enterprise products: Read the document: How to verify that a Symantec Corporate antivirus product is set to scan all files.


  2. Run a full system scan.
  3. If any files are detected, follow the instructions displayed by your antivirus program.
  4. Delete the autorun.inf file from writeable removable devices, if necessary.
Important: If you are unable to start your Symantec antivirus product or the product reports that it cannot delete a detected file, you may need to stop the risk from running in order to remove it. To do this, run the scan in Safe mode. For instructions, read the document, How to start the computer in Safe Mode. Once you have restarted in Safe mode, run the scan again.


After the files are deleted, restart the computer in Normal mode and proceed with the next section.

Warning messages may be displayed when the computer is restarted, since the threat may not be fully removed at this point. You can ignore these messages and click OK. These messages will not appear when the computer is restarted after the removal instructions have been fully completed. The messages displayed may be similar to the following:

Title: [FILE PATH]
Message body: Windows cannot find [FILE NAME]. Make sure you typed the name correctly, and then try again. To search for a file, click the Start button, and then click Search.

4. To delete the value from the registry
Important: Symantec strongly recommends that you back up the registry before making any changes to it. Incorrect changes to the registry can result in permanent data loss or corrupted files. Modify the specified subkeys only. For instructions refer to the document: How to make a backup of the Windows registry.
  1. Click Start > Run.
  2. Type regedit
  3. Click OK.

    Note: If the registry editor fails to open the threat may have modified the registry to prevent access to the registry editor. Security Response has developed a tool to resolve this problem. Download and run this tool, and then continue with the removal.

  4. Navigate to the following registry subkeys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders
    HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Windows\"load"

  5. In the right pane, delete any values associated with the worm.


  6. Exit the Registry Editor.

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