Akbot

Akbot was a computer virus that infected an estimated 1.3 million computers and added them to a botnet. It was created by an 18-year-old named Owen Walker, who was charged but unconvicted in 2008.

Infection
Akbot is an IRC controlled backdoor program. It allows an outside user to take control of the infected computer. Akbot operates by joining IRC servers and the waiting for further instructions. Once installed, Akbot can be used to gather data, kill processes, or perform DDOS attacks.