Unfortunately port 7000 was used to hack my iMac Apple Silicon 2 days ago, to control over my app, updated Xcode from unknown source and also changed Viber messenger. The hack thing was almost invisible, performed via previously hacked wifi router. So I decided to restore my system. I performed power button holding to enter my system options. I erased whole ssd and tried to load fresh new system. Well it does not go well, as the update server was unreachable - strange seemed to me. Than I realized that hackers have done something to my system options to force me not to revive or restore whole MacOS. I had to perform terminal destroy disk keys operation, ( terminal> xartutil --erase-all ) than I have found my iMac like diskless/bricked. I used Apple Configurator 2 to get my system back online and here I'm restored and healthy. Port 7000 is definitively dangerous to listen on while bad guys nearby... I almost forgot - my MacOS firewall was set to "blocking all incoming connections". So it seems there is still a way how to enter my MacOS.