What is the fine-grained topic of the following text: PCI DSS and other standards driven bodies today are primarily concentrated on trying to stop malware getting onto the network and yet, dwell time, the amount of time malware sits in a network undetected, shows malware goes undetected for up to eight months during a breach, meaning it does get in but then is undetected. Only return the topic.
Undetected Malware and Dwell Time in Network Security Standards