From over at arstechnica, the "BadBios" virus allegedly gets into the firmware (BIOS or UEFI) and fights all attacks on it. Allegedly, from its deep seated position, it is able to prevent booting from the optical drive in order to restore the system. The story claims that the virus was found in MacBook Airs and communicated with other infected machines in order to maintain its resistance to countermeasures: when no other avenue of communication was available (wireless was disabled), the computers seemed to be communicating with ultrasonic signals through speakers and mics. This all seems to me to be rather questionable, the story seems riddled with logical and pendantical flaws. Should this be taken seriously?