Navidad virus
W32.Navidad is a mass-mailing worm program or virus, discovered in December 2000 that ran on Windows 95, Windows 98, Windows NT, and Windows 2000 systems. It was designed to spread through email clients such as Microsoft Outlook while masquerading as an executable electronic Christmas card. Depending on the variant, infected computers can be identified by blue eye icons or ICQ logos which appear in the Windows system tray.