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Microsoft:Protect yourself from the Conficker computer worm

Published: March 27, 2009
Protect yourself from the Conficker computer worm

The Conficker worm is a computer worm that can infect your computer and spread itself to other computers across a network automatically, without human interaction.

If you are an IT professional, please visit Conficker Worm: Help Protect Windows from Conficker.

On This Page
Am I at risk of having the Conficker worm?Am I at risk of having the Conficker worm?
What does the Conficker worm do?What does the Conficker worm do?
How does the Conficker worm work?How does the Conficker worm work?
How do I remove the Conficker worm? How do I remove the Conficker worm?
Where can I find more technical information about the Conficker worm and how can I stay up to date on the Conficker worm?Where can I find more technical information about the Conficker worm and how can I stay up to date on the Conficker worm?

Am I at risk of having the Conficker worm?

Most antivirus software could detect and block the Conficker worm, so if you have updated antivirus software on your computer, you are at a much lower risk of being infected by the Conficker worm.

If you or your network administrator have not installed the latest security updates from Microsoft and your antivirus provider, and if you have file-sharing turned on, the Conficker worm could allow remote code execution. Remote code execution allows an attacker to take control of your computer and use it for malicious purposes.

What does the Conficker worm do?

To date, security researchers have discovered two variants of the worm in the wild.

Win32/Conficker.A was reported to Microsoft on November 21, 2008.

Win32/Conficker.B was reported to Microsoft on December 29, 2008.

Win32/Conficker.C was reported to Microsoft on February 20, 2009.

Win32/Conficker.D was reported to Microsoft on March 4, 2009.

Win32/Conficker.B might spread through file sharing and via removable drives, such as USB drives (also known as thumb drives). The worm adds a file to the removable drive so that when the drive is used, the AutoPlay dialog will show one additional option.

The Conficker worm can also disable important services on your computer.

In the screenshot of the Autoplay dialog box below, the option Open folder to view files — Publisher not specified was added by the worm. The highlighted option — Open folder to view files — using Windows Explorer is the option that Windows provides and the option you should use.

If you select the first option, the worm executes and can begin to spread itself to other computers.

 The option Open folder to view files — Publisher not specified was added by the worm.

The option Open folder to view files — Publisher not specified was added by the worm.

How does the Conficker worm work?

Here’s an illustration of how the Conficker worm works.

 Here's a visual explanation of how the Conficker worm works.

How do I remove the Conficker worm?

If your computer is infected with the Conficker worm, you may be unable to download certain security products, such as the Microsoft Malicious Software Removal Tool or accessing certain Web sites, such as Microsoft Update. If you can't access those tools, try using the Windows Live OneCare Safety Scanner.

Where can I find more technical information about the Conficker worm and how can I stay up to date on the Conficker worm?

For additional information, see Centralized Information About the Conficker Worm.

For more technical information about the Conficker worm, see the Microsoft Malware Protection Center Virus Encyclopedia

Bookmark the Microsoft Malware Protection Center portal and the Microsoft Malware Protection Center blog for updated information.

For symptoms and detailed information about how to remove the Conficker worm, see Help and Support: Virus alert about the Conficker Worm.

To continue to get updated information on security, sign up for the Microsoft Security for Home Computer Users newsletter.

For more information, see How to prevent computer worms and How to remove computer worms.



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4 comments:

infinitewebprofit said...

This virus is really hurting the computer owners invaded by it. Microsoft is offering big reward to people who can pinpoint who were the culprit of this.

igvirene said...

Hi, thanks for the very informative information.

igvirene said...

Anyway, I added you on my links. Can we ex-links?

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