A program that connects the computer to the Internet via a telephone line and modem. Malicious dialers will secretly connect the computer to premium-rate lines.

A browser plug-in which provides additional functionality not included in the standard browser. May introduce security risks not present in the standard browser.

A type of worm that spreads on vulnerable Bluetooth networks.

A utility designed to access remote computers. Though legal, a hacktool can be used with malicious intent.

An application sold through fraudulent or deceptive methods. May not work as intended, or may cause damage to the user's system.

A program containing problems that prevent it from functioning as the author intended.

A type of worm that spreads on vulnerable Internet Relay Chat (IRC) networks.