The ExploreZip worm replicates itself by mailing itself out to unread messages in Microsoft Outlook, Outlook Express and Exchange.

CNN: ExploreZip stings Marine Corps HQ - October 23, 19999

The worm that infected computers at the Marine Corps headquarters at the Pentagon early Friday was ExploreZip, an especially malicious virus that typically travels by e-mail, according to a Marine Corps spokesman.

CNN: ExploreZip stings Marine Corps HQ - October 23, 19999