An analysis of the Conficker peer-to-peer network set up by the latest variant of the worm shows that the size of the network is far smaller than originally thought. Analysts at Kaspersky Lab have been observing the network and found that includes about 200,000 machines. The P2P network is being used by the worm s creators to distribute updates to infected machines. There are a number of infected machines that are not connected to any other infected PCs in the network.
Source: https://threatpost.com/conficker-botnet-not-nearly-large-feared-041609/72589/