Attackers use rootkits to hide malware on a device in a way that allows it to persist undetected over time, sometimes for years. During that time, it can steal data or resources, or surveil communications. Operating system-based rootkits are scary enough, but firmware rootkits even more so. Both seek to persist, hide and evade from processes and procedures to eradicate them.
Kernel or operating system rootkits for many years were a dangerous threat to computers. Then Microsoft made a major change in the operating system with Microsoft Vista in 2006. It required that vendors digitally sign drivers.
