High Traffic

Hello, I have RB 750, connected to internet, with no LAN traffic i see lots of https traffic, it hits up to 10mb in both directions. What could this be? i tried to reset the router but the issue is still there.

Probably: https://blog.mikrotik.com/security/winbox-vulnerability.html

What RuterOS version are you running?
Do you have Winbox open on the outside?
Are you sure you are not hacked?

winbox restricted to internal IP, and router OS 6.43.2, if its hacked is netinstall only way out?

Netinstall is the only foolproof way to resolve a hacked router.

You could go through the configuration and remove what appears suspicious (proxies and such), but it is nearly impossible to say with 100% certainty that the router is no longer compromised. Perhaps there is a hidden script that runs each time the router boots. Perhaps a firewall rule is ineffective due to some hidden code.

So, it’s better to wipe and reinstall.