Malicious programs can use fan noise to steal data from physical isolation systems

Malicious programs can use fan noise to steal data from physical isolation systems

Computer physical isolation does not mean that the data in the data can be carefree. Many studies have shown that electromagnetic radiation and heat radiation can be used to steal data from physical isolation systems. Researchers at Ben-Gurion University in Israel have created a malicious Fansmitter that can use a fan on an infected host to send stolen data. All data is essentially a series of 0 and 1. Fansmitter takes over the fan speed after infection, so that the binary numbers 0 and 1 work at different fan speeds. Fansmitter can be used for CPUs, GPUs, and chassis fans, effectively working 1 to 4 meters away, the researchers believe that the distance can be connected to a microphone or smartphone left in the room to record the fan speed. Interested parties can read their paper Fansmitter: Acoustic Data Exfiltration from (Speakerless) Air-Gapped Computers (PDF ).

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