Email worms

ILOVEYOU, sometimes referred to as the Love Bug or Loveletter, was a computer worm that infected over ten million Windows personal computers beginning on 4 May 2000. It started spreading as an email message with the subject line "ILOVEYOU" and the attachment "LOVE-LETTER-FOR-YOU.TXT.vbs". Windows computers often hide the VBS file extension (a type of interpreted file) by default, because it is an extension for a file type that Windows knows, leading unwitting users to think it was a normal text file. Opening the attachment activated the VBScript script. First, the worm inflicted damage on the

Mydoom was a computer worm that targeted computers running Microsoft Windows. It was first sighted on January 26, 2004. It became the fastest-spreading e-mail worm ever, exceeding previous records set by the Sobig worm and ILOVEYOU, a record which as of 2026 has yet to be surpassed.

computer worm

backdoor Trojan horse found in Windows

computer email worm geared to children

Klez is a computer worm that propagates via e-mail. It first appeared in October 2001 and was originated in China. A number of variants of the worm exist.

Brontok is a computer worm running on Microsoft Windows. It is able to disperse by e-mail. Variants include:

Happy99 (also termed Ska or I-Worm) is a computer worm for Microsoft Windows. It first appeared in mid-January 1999, spreading through email and usenet. The worm installs itself and runs in the background of a victim's machine, without their knowledge. It is generally considered the first virus to propagate by email, and has served as a template for the creation of other self-propagating viruses. Happy99 has spread on multiple continents, including North America, Europe, and Asia.

family of computer worms

The Sobig Worm was a computer worm that infected millions of Internet-connected, Microsoft Windows computers in August 2003.

computer worm

computer worm

ExploreZip (also known as I-Worm.ZippedFiles) is a destructive computer worm that attacks machines running Microsoft Windows. It was first discovered in Israel on June 6, 1999. The worm contains a malicious payload, and utilizes Microsoft Outlook, Outlook Express, or Exchange to mail itself out by replying to unread messages in the user's inbox. The worm also searches mapped drives and networked computers for Windows installations. If found, it copies itself to the Windows folder of the remote computer and then modifies the Win.ini file of the infected computer. On January 8, 2003, Symantec di

1999 JavaScript worm

family of computer worms