Malware that infected hundreds of thousands of Macs could be raking in a cool $10,000 per day, researchers say. More than 600,000 Macs were infected with Flashback, which spread using a Java vulnerability. Apple began pushing an update for that Java vulnerability less than two weeks after the malware was discovered, on April 4, 2012. Symantec: 25,000 click-fraud infections could generate up to $450 per day. Older Macs remain at risk because Apple is no longer shipping Leopard security updates.”]
Source: https://www.darkreading.com/attacks-breaches/mac-flashback-malware-bags-big-bucks