This white paper provides a thorough explanation of one of the more potent malware classifications effecting systems and networks today – the Storm/Nuwar Botnet. The evolution of the Storm Worm is fascinating and there are no other malware families quite so well organized and controlled. While security software can mitigate the direct impact of Nuwar and other bot-related malware on individual systems, the wider effects of botnet activity need additional countermeasures. A multi-layered security strategy where signature detection is supplemented by generic filtering, intrusion detection and protection and other preventative controls, as well as backup and recovery strategies, remains an operational necessity.