A wave of fake email Twitter invitations carry a mass-mailing worm, Symantec researchers said Thursday. The invitations look like they've come from a Twitter account, except the URL that would ordinarily be part of the standard text is missing. What is included is an attachment named “Invitation Card.zip.” Clicking it installs a mass-mailing worm that gathers email addresses from the compromised computer and spreads via removable drives. — CAM