Router, network device, and Internet of Things malware is increasingly common. Most focus on infecting vulnerable devices and adding them to powerful botnets. Routers and Internet of Things (IoT) devices are always powered-up, always online, and waiting for instructions. Perfect botnet fodder, then. But not all malware is the same. VPNFilter is a destructive malware threat to routers, IoT devices, and even some network-attached storage (NAS) devices.