Hackers have developed a backdoor entry called “Mac.BackDoor.iWorm” that gains access to Macs and uses Reddit to connect the hacked computer with a command server. Once the computer is infected, the iWorm uses Reddit’s search function to hunt down posts made by the hackers. Researchers estimate that most of the infected Macs are in the U.S. There’s no evidence that any of the estimated 17,658 Macs infected are actively getting used by hackers.”]
Source: https://gizmodo.com/hackers-are-using-reddit-to-connect-17-000-macs-to-a-bo-1642062140