Botnets continue to constitute a major security threat to users of the internet. We examine a novel security game between a botmaster and the legitimate users of a compromised network. The more the botmaster utilizes his botnet, the more likely it is the legitimate users of the network will detect him. Thus he must balance stealth and aggression in his strategic utilization of his botnet. The legitimate users of the network then must decide how vigilant they will be in trying to detect the presence of the botnet. Our model makes use of other recent works that have studied botnets using local mean field models. We prove the existence of a pure Nash equilibrium between the network of agents and the botmaster.