Viruses/Worms News

Microsoft steps on Conficker worm

Tuesday, September 15, 2009

Using virus protection features already in place for the upcoming release of Windows 7, Microsoft retroactively applied security fixes to its older operating systems yesterday in order to help stop the spread of the Conficker worm.

The worm, which can be used to remotely access infected computers, copies itself to any USB storage devices connected to an infected machine. Microsoft's fix alters Windows' "autoplay" functionality so that the worm does not spread automatically if an infected USB device is connected to an uninfected computer.

The fix must be downloaded manually from Microsoft's website, and will not be automatically installed by Windows Update or other automatic update services. The Conficker worm propagates via network shares as well as USB storage devices, and can lock down an entire network even if only one computer is infected. It does this by attempting to log into every computer on the network and triggering system lockouts after too many failed attempts.

Microsoft had promised the fix as long ago as April but refused to set a definite timeline. The fix was not released until August 25.
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