Infrastructure
What is Hypervisor?
The software that runs whole operating systems as guests on one physical machine, such as VirtualBox or VMware.
A hypervisor is the software layer that runs whole operating systems as guests on a single physical machine. Desktop hypervisors include VirtualBox and VMware Workstation. Server hypervisors such as VMware ESXi and Hyper-V run data centre workloads.
For analysts, a hypervisor is what makes a disposable lab possible. For attackers, a server hypervisor is a high-value target, because encrypting it takes down every virtual machine it hosts at once.