I/T Definition: Botnet

Botnet – multiple computers which are infected by malware and have come under the control of an attacker.
The malware used by botnets can infect your computer, turning it into a “bot” or “zombie,” meaning your computer can become part of the botnet and help criminals do their dirty work. Botnets are used to distribute spam or phishing emails and to conduct attacks against non-infected computers.