OSX/MaMi hijacks macOS?s DNS settings to intercept traffic by routing it through malicious servers...But unless you did something to bypass macOS?s Gatekeeper security, you likely have nothing to worry about since the malware?s executable isn?t signed by Apple.
Patrick [Wardle] believes that the attackers could be using lame methods like malicious emails, web-based fake security alerts/popups, or social-engineering type attacks to target Mac users.
Open System Prefs->Network. Click "Advanced" and then the "DNS" tab. Look for:82.163.143.135
82.163.142.137
If you find those IP addresses, you have been infected by the malware. Currently no fix, but you can at least delete those two addresses.Hacker News (https://thehackernews.com/2018/01/macos-dns-hijacker.html)
I failed to mention the need to check all your internet access methods: WiFi, Ethernet, etc. WiFi usually has the modem address, 10.0.0.xxx.