The collection of millions of hacked computers known as Aisuru and Kimwolf have been used to launch some of the biggest distributed denial-of-service (DDoS) attacks ever seen. Now United States law enforcement agencies have wiped both of them off the internet, along with two of the other hordes of hijacked computers—known as botnets—in a single broad takedown.On Thursday, the US Department of Justice, working with the cybercrime-fighting agency within the US Department of Defense known as the De...