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Operation b49: Microsoft takes on the bots

Operation b49: Microsoft takes on the bots

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Botnets are networks of compromised computers that are controlled remotely and secretly by one or more cybercriminals.  If your computer is infected with a botnet it can perform automated tasks over the Internet without your knowledge. These tasks often include sending out large numbers of spam messages to people in your contact list.

Microsoft is committed to fighting botnets through technological advances, guidance, and legal efforts.  In February of this year Microsoft helped take down the Waledac botnet in an effort known internally as "Operation b49."

Judge to award domains to Microsoft

Last week the District Court of Eastern Virginia granted default judgment in favor of Microsoft, awarding the 276 domains once used by the Waledac "bot-herders" to Microsoft to help ensure those domains are never used for cybercrime again.

This victory for Microsoft could change the way industry and governments around the world fight botnets.

The cleanup effort

Microsoft is now in phase 2 of Operation b49, which includes cleanup and resolution. It's still very early in the cleanup process, but the goal is to help people clean up as many infected computers as possible.

To support the botnet cleanup effort, Microsoft launched a special page devoted to helping you clean out your computer if you think it's been infected by a botnet.

For more information, see


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