DOK Malware is a stealthy malicious code recently discovered by researchers at security firm CheckPoint. The DOK malware is being distributed via phishing emails, the researchers added that this is the first major scale malware to target Mac OS X users. Once the malware infects a system, it gains administrative privileges and install a new root certificate. The root certificate allows the malicious code to intercept all victims communications, including SSL encrypted traffic. The malware has zero detections on VirusTotal and is signed with a valid developer certificate (authenticated by Apple)”]
Source: http://securityaffairs.co/wordpress/58495/cyber-crime/dok-malware-macos.html