A new attack method named COVID-bit uses electromagnetic waves to transmit data from air-gapped systems, which are isolated from the internet, over a distance of at least two meters (6.5 ft), where it’s captured by a receiver.
The information emanating from the isolated device could be picked up by a nearby smartphone or laptop, even if a wall separates the two.
The COVID-bit attack was developed by Ben-Gurion University researcher Mordechai Guri, who has designed multiple methods to steal sensitive data from air-gapped systems stealthily. Prior work includes the “ETHERLED” and “SATAn” attacks.
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Source: Bleeping Computer