Botnets are always evolving in the cat and mouse game against security and detection tools. One Russian botnet known as SpyEye is going a step further in a move akin to the old assembly language game Core War. Only this time, instead of residing within a single system's RAM, this fight for existence spans the Internet as SpyEye attempts to kill off its rival, the larger Zeus botnet. Before it completely removes the Zeus botnet from an infected host, SpyEye also attempts to hijack the communications Zeus sends back to its control center which permits the SpyEye owners to pilfer the same credentials without having to create the functionality. Criminals can purchase a time share on the SpyEye botnet for as little as $500.