I pinged one site (not from my network), then I added IP of this site to my hosts file in the same lines with my localhost, local IP address and my router address (like below)
ip of that site my localhost adress ip of that site my router adress ip of that site my local ip adress
Then entered this IP of that website in browser. Some time later, I typed netstat-a and I saw this:
TCP [::1]:445 MYCOMPUTER:50016 ESTABLISHED TCP [::1]:50016 MYCOMPUTER:microsoft-ds ESTABLISHED
My OS is Windows 10. I never had file and printer sharing enabled, and my computer never was in any group. It is possible that someone from that IP accessed my computer?