"FruitFly" Malware (Mac/Windows) went unnoticed for 13 years

Phillip R. Durachinsky, of North Royalton, Ohio, is alleged to have used Mac malware known as “Fruitfly” to remotely control victims’ computers, access and upload files, grab screenshots, log keystrokes, and surreptitiously spy via infected computer’s webcams

Durachinsky is said to have used malware he created between 2003 and January 2017 to steal personal data, tax records, passwords, and “potentially embarrassing communications.”

https://www.welivesecurity.com/2018/01/13/fruitfly-malware-spied-mac-users-13-years-man-charged/