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“If you infected my Mac and recorded me all the time, you’d see me sitting at my desk, picking my nose, petting my dog, and occasionally swearing at my computer,” said Wardle. (Courtesy of Patrick Wardle)Įavesdropping on a video call is probably more useful than recording at random intervals, because that’s when people share sensitive or important information. In this diagram, “!detected” means “undetected,” and “exfil” is short for exfiltrate, or extract. It then shuts itself off when the video call is over to allow the light to turn off, too. But when you initiate a video chat, you’re already expecting that green LED to illuminate-so the malware can piggyback on the recording without raising suspicion. Disabling that light is almost impossible without physically taking apart a laptop, so if it unexpectedly turns on, it’s pretty clear that something’s up. When the camera on a Mac laptop starts recording, it also turns on a green indicator light. The genius of this kind of an attack, Wardle says, is that it’s virtually undetectable.








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