4/26: Mytob-BO Worm Spreads Flaw
April 26, 2005

W32.Mytob.BO@mm is a mass-mailing worm that uses its own SMTP engine to send an email to addresses that it gathers from the compromised computer. The worm spreads through the network by exploiting the Microsoft Windows Local Security Authority Service Remote Buffer Overflow (as described in Microsoft Security Bulletin MS04-011).

Technical details can be found at Symantec page.