Security researchers have long been investigating potential attacks that undermine the foundation of modern software based defenses. For years this has remained a persistent issue without a comprehensive solution. Now, firmware and hardware threats have taken new significance due to recent research from ESET, which has uncovered one of the first UEFI rootkits being used by attackers in the wild (additional coverage).

https://eclypsium.com/2018/10/01/uefi-attacks-in-the-wild/