January 20, 1999: The Happy99 worm first appeared. It invisibly attaches itself to emails, displays fireworks to hide the changes being made, and wishes the user a happy New Year. It modifies system files related to Outlook Express and Internet Explorer (IE) on Windows 95 and Windows 98.

November 21, 2008: Computer worm Conficker infects anywhere from 9 to 15 million Microsoft server systems running everything from Windows 2000 to the Windows 7 Beta. The French Navy, UK Ministry of Defence (including Royal Navy warships and submarines), Sheffield Hospital network, German Bundeswehr and Norwegian Police were all affected. Microsoft sets a bounty of […]

September 9, 2010: The virus, called “here you have” or “VBMania”, is a computer worm that successfully attacked tens of thousands of Windows computers in 2010 when it was sent as a link inside an email message with the text “Here you have” in the subject line. The final extension of the link was hidden […]

July 13, 2001: Code Red was a computer worm observed on the Internet. It attacked computers running Microsoft’s IIS web server. The Code Red worm was first discovered and researched by eEye Digital Security employees Marc Maiffret and Ryan Permeh, the Code Red worm exploited a vulnerability discovered by Riley Hassell. They named it “Code […]