Antivirus companies warn of new Bagle variants

New versions of the Bagle worm rolled onto the Internet Friday, prompting antivirus companies to warn customers about the threat and to push out software updates to spot the new worms.

Three new versions of Bagle have been seen by antivirus companies, each similar to earlier forms of the worm, which first stormed onto the Internet in January, spreading through infected e-mail file attachments. McAfee (Profile, Products, Articles) Inc. rated two of the new worms "medium" threats. Other antivirus vendors, including Symantec (Profile, Products, Articles) Corp. and Sophos (Profile, Products, Articles) PLC also reported intercepting many samples of the new worms and advised customers to update antivirus signatures as soon as possible.

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