A new variant of the X-Agent spyware is now targeting Apple’s Mac OS system. The malware is designed to steal web browser passwords, take screenshots of the display, detect system configurations, execute files and exfiltrate iPhone backups stored on the computer. The new Mac malware is being planted by exploiting a vulnerability in the MacKeeper software installed on the targeted computers and known malware dropper a first-stage trojan that APT28 uses to infect machines. The research is still ongoing and Bitdefender security researchers right now only have the Mac malware sample and not a full picture of how an attack works.
Source: https://thehackernews.com/2017/02/xagent-malware-apt28.html