(A botnet virus that communicates by connecting to an IRC server and then taking control of a compromised computer. Botnet (English name is BotNet) is a group of computers on the Internet that are centrally controlled by hackers. They are usually used by hackers to recommend large-scale network attacks, such as distributed denial of service attacks (ddos), massive spam, etc. The information retained by these computers under control can also be "accessed" by hackers at will. thus,)