A malicious program that secretly integrates itself into program or data files. It spreads by integrating itself into more files each time the host program is run.

A program that secretly and maliciously integrates itself into program or data files. It spreads by integrating itself into more files each time the host program is run.

A program that does not fall into any other category.

A standalone malicious program which uses computer or network resources to make complete copies of itself. May include code or other malware to damage both the system and the network.

A trojan that contains one or more malicious programs, which it will secretly install and execute.

A malicious program that secretly integrates itself into program or data files. It spreads by integrating itself into more files each time the host program is run.

A malicious program that secretly integrates itself into program or data files. It spreads by integrating itself into more files each time the host program is run.

A worm that spreads via e-mail, usually in infected executable e-mail file attachments.

A standalone malicious program which uses computer or network resources to make complete copies of itself. May include code or other malware to damage both the system and the network.

A standalone malicious program which uses computer or network resources to make complete copies of itself. May include code or other malware to damage both the system and the network.