What is a botnet?

What is a Bot?

A "bot" is a type of malware that allows an attacker to take control over an affected computer. Also known as “Web robots”, bots are usually part of a network of infected machines, known as a “botnet”, which is typically made up of victim machines that stretch across the globe

Since a bot infected computer does the bidding of its master, many people refer to these victim machines as “zombies.” The cybercriminals that control these bots are called botherders or botmasters.

Some botnets might have a few hundred or a couple thousand computers, but others have tens and even hundreds of thousands of zombies at their disposal. Many of these computers are infected without their owners' knowledge. Some possible warning signs? A bot might cause your computer to slow down, display mysterious messages, or even crash.

How Bots Work

Bots sneak onto a person’s computer in many ways. Bots often spread themselves across the Internet by searching for vulnerable, unprotected computers to infect. When they find an exposed computer, they quickly infect the machine and then report back to their master. Their goal is then to stay hidden until they are instructed to carry out a task.

After a computer is taken over by a bot, it can be used to carry out a variety of automated tasks, including the following: