Mysterious Mac and PC malware that jumps airgaps?
The audio channel doesn't make any sense to me; when I heard it from Dragos on Facebook the first time, I was actually a little worried about him. It's not that I think it's impossible to create a covert channel over audio; it obviously isn't. It's that for the malware story to play out, the covert receiver needs to already exist; if it does, you're already infected, so what does "air gapping" matter?