Tech watch: Fans transmitting data from air-gapped computers
Researchers at Ben Gurion University have published a paper regarding their experiments transmitting data from an air-gapped computer to a smartphone in the same room. They were able to inject malware into the computer that used the noise from the cooling fans in the computer to transmit binary data to a remote microphone.
From the research paper:
…we present Fansmitter, a malware that can acoustically exfiltrate data from airgapped computers, even when audio hardware and speakers are not present. Our method utilizes the noise emitted from the CPU and chassis fans which are present in virtually every computer today. We show that a software can regulate the internal fans’ speed in order to control the acoustic waveform emitted from a computer. Binary data can be modulated and transmitted over these audio signals to a remote microphone (e.g., on a nearby mobile phone). We present […]

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