Kelihos is a botnet which utilizes P2P communication to maintain its CnC Network.
A while ago a group of researchers has analyzed and tested the resilience of P2P botnets, and has discovered that while Zeus and Sality botnets are highly resilient to sinkholing attacks, Kelihos and ZeroAccess botnets have weaknesses that can be used to disrupt them.
In recent months, several researchers have highlighted an uptick in bruteforce password guessing attacks targeting blogging and content management systems.
Growth in external hacking attempts, DDoS and malware attacks, and internal threats to data are the key security concerns for UK businesses.
Keeping their botnet's C&C centers online is crucial for bot herders, so that they can keep taking advantage of the computers they zombified.