Look for names such as TeamViewer, NoMachine, Ammyy Admin, Mikogo, AnyDesk, Chrome Remote Desktop, WebEx Meetings, ThinVNC, UltraVNC. In fact, unless you know you need them, switch off everything in this panel.Ĭheck your Applications folder for anything you don't recognise. If you didn't & someone else is using it to access, removing it will seriously hamper their attempts.ĭisable Remote Login, Management & Apple Events. If you installed such an app, you would allow this to be enabled. Several legitimate remote access apps add their own user here, for example, NoMachine adds a user called nx. If there are any accounts there you don't recognise, remove them by clicking the - box bottom left. If so, disable the wifi on the Mac & wire up to the router directly, with an ethernet cable.Ĭlick the lock, supply your admin password, then change your passwords on all known accounts. If the attacker can still get in when your router is switched off, then they must be within 50 feet of you, directly accessing your iMac's wifi. Set them to two different passwords.Ĭheck if it has UPnP capability & if it's possible to switch this off. Reset then change the passwords of both admin access & the wifi password. Unplug or switch off your router.Ĭheck your router's instruction manual for how to reset it to factory defaults. I do this legitimately to access many Macs on my network & remotely around the country.ĭisconnect from the internet.
With the necessary permissions it would be quite easy to do all of this without you knowing anything other than the fans had activated. Getting past your router's firewall is not trivial & can best be initiated by something on your own computer than from outside.Īlso, an expert attacker would be unlikely to use an attack vector which would let you simply see what they're doing. I suspect you've been socially engineered into giving someone Remote Access. I would be surprised if this was an expert attack.
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