Two experts expressed different ideas of what Conficker represented. One expert argued that Conficker was clearly not a botnet, as it lacked some of the basic abilities typically found in botnets. In my opinion, Conficker appears as a package or a mesh of several different threats, each one with its own purpose. In the end they both agreed Conficker represents a significant threat, in the case of our two experts, they were both right and wrong. Read the full story on Conficker.
Source: https://threatpost.com/examining-conficker-when-worm-becomes-botnet-060309/72735/