Botnets have become the first-choice attack platform for the network attackers to launch distributed denial of service attacks

steal sensitive information and send spam.They have raised serious threats to normal operation of the Internet and the benefits of the Internet users.The investigation on the wild botnets activities is the necessary for the fur-ther monitering and countermeasure against world-wide botnets.Based on the investigation and analysis on tracking re-cords of 1 961 wild botnets

it shows the statistical results of botnet activities

including amount of botnets

command and control channel distributions

botnet size and end-host distributions

and various types of botnet attack activities.