W32.Netsky.X@mm Discovered on: April 20, 2004 Last Updated on: April 20, 2004 10:30:22 AM As of April 20, 2004, due to an increased rate of submissions, Symantec Security Response has upgraded W32.Netsky.X@mm to a Category 3 level threat from a Category 2 threat. W32.Netsky.X@mm is a variant of W32.Netsky.W@mm that scans for email addresses on all non-CD-ROM drives on the infected computer. Then, the worm uses its own SMTP engine to send itself to the email addresses that it finds. The From line of the email is spoofed, and its Subject, Message, and Attachment vary. The attachment has a...