“Perverse” malware infecting hundreds of Macs remained undetected for years

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Surveillance malware dubbed Firefly was easy to spot but flew under the radar anyway.

A mysterious piece of malware that gives attackers surreptitious control over webcams, keyboards, and other sensitive resources has been infecting Macs for at least five years. The infections—known to number nearly 400 and possibly much higher—remained undetected until recently and may have been active for almost a decade.