Beagle 2, the European Space Agency's Mars explorer, did not have much success with its mission of exploring the surface of the Red Planet. But a new e-mail worm with the same name is apparently having better luck exploring the Internet, according to warnings issued Monday by leading anti-virus software companies.
The new worm, known as W32.Beagle and W32.Bagle, appeared on Sunday and spreads by harvesting e-mail addresses from computer hard drives, then mailing copies of itself out to those addresses, faking the "from" address on e-mail messages it sends, anti-virus companies said.
The worm arrives in an e-mail file attachment with a randomly generated name and EXE extension. E-mail messages containing the worm have the subject "Hi" and a message body that reads: "Test =)" followed by some randomly generated characters and then "Test, yep," said F-Secure Corp. of Helsinki.
The worm affects computers running a number of versions of Microsoft Corp.'s Windows operating system including Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, and Windows XP. It is programmed to stop spreading on January 28, 2004, F-Secure said.
Mass mailing worms are common and Beagle's suspicious subject line and message body should be enough to keep most users from opening the file attachment and infecting themselves. Also, many companies block e-mail messages that contain EXE file attachments, which would stop the spread of the worm, F-Secure said.
However, Beagle appears to be particularly good at harvesting e-mail addresses from its victims and then targeting those addresses with copies of itself, which may account for its spread, the company said.
Assessments of Beagle's threat varied widely on Monday. Symantec rated Beagle a Level 2 or "low" threat, meaning that the company considered Beagle "reasonably harmless and containable." F-Secure said Beagle was a "Level 1" threat on its virus radar, the highest level alert indicating a worldwide epidemic of a serious new virus such as Nimda, the company said.
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