A trojan, or trojan horse, is a seemingly legitimate program which secretly performs other, usually malicious, functions. It is usually user-initiated and does not replicate.

Trojan-Spy:W32/ZBot.XF is a trojan-spy.

Trojan-spy applications attempt to steal online banking login-information and other sensitive data from the infected computer.

ZBot.XF also targets online poker and gaming sites.

Konov is a Java (J2ME) trojan.

Konov will work on most phones capable of executing Java programs. Once executed Konov will send SMS messages to premium rate numbers.

Tracking cookies are files that track your web browsing habits.

Tracking cookies are browser settings that provide websites a unique ID for the user. The tracking cookies are constantly recreated when you browse the web.

This type of trojan secretly installs spy programs and/or keylogger programs.

This type of trojan secretly downloads malicious files from a remote server, then installs and executes the files.

This type of trojan secretly downloads malicious files from a remote server, then installs and executes the files.

AutoRun worm.

A type of worm that replicates by sending complete, independent copies of itself over a network.

A program or set of programs which hides itself by subverting or evading the computer's security mechanisms, then allows remote users to secretly control the computer's operating system.

A remote administration utility which bypasses normal security mechanisms to secretly control a program, computer, or network.

This malware downloads files into the system and executes them.

A type of trojan that includes a variety of spy programs and keyloggers.

This type of trojan secretly downloads malicious files from a remote server, then installs and executes the files.

This type of trojan contains one or more malicious files, which it will secretly install on the system.

BopSmiley is a spying application for mobile phones using Windows PocketPC or Windows Smartphone operating systems.

When the application is active on a phone, it records both voice call and SMS information and sends the details to a third party server.

Adware: A type of Advertising Display Software that delivers advertising content potentially in a manner or context that may be unexpected and unwanted by consumers.

Many adware applications also perform tracking functions, and therefore may also be categorized as Tracking Technologies.

Trojan.Win32.Monder.gen is generic detection of trojans that are involved in the installation of "Virtumonde" adware/spyware.

A remote administration tool (RAT) which bypasses normal security mechanisms to secretly control a program, computer or network.

Backdoors are Remote Administration Tools (RAT) that expose infected machines to external control via the Internet.

IRCBots are a type of "bot" that receive commands and are controlled via Internet Relay Chat (IRC).

Botnets have been used for sending spam remotely, installing more malware without consent, and other illicit purposes.