This update is adding the following further details: this threat is not a UEFI firmware implant or rootkit, it's a UEFI bootkit attacking the bootloader. The Bootkitty sample analyzed by ESET was not unkillable.

The first UEFI bootkit specifically targeting Linux systems has been discovered, marking a shift in stealthy and hard-to-remove bootkit threats that previously focused on Windows.

Cybersecurity researchers have discovered the first-ever bootkit designed to target Linux systems and subvert their boot process for malicious purposes. The

ESET researchers have uncovered a prototype UEFI bootkit targeting Ubuntu Linux, marking an expansion of bootkit attacks beyond Windows.

Bootkitty doesn’t bite… yet Security researchers say they've stumbled upon the first-ever UEFI bootkit targeting Linux, illustrating a key moment in the evolution of such tools.… Dubbed "Bootkitty" by Slovak security shop ESET,