Klez worm could compromise sensitive data

Thursday, 25 April 2002, 1:33 PM EST

The initially innocuous Klez worm is turning nasty as vandals tweak both the mode of attack and the payload.

Most important, at least one security firm reports that the newest version of this worm will sometimes share your confidential files with others.

Now in its third or fourth version, the big change came when W32.Klez.H@mm (Symantec's name) was developed from W32.Klez.E@mm, which first showed up in mid-January 2002.

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