https://plugin-planet.com/blackhole-pro/

Developed by 10-year WP astronaut Jeff Starr, Blackhole Pro is a WordPress security plugin that automatically detects and traps bad bots in a virtual blackhole, where they are blocked from your site. Bad bots are the worst. They do all sorts of nasty stuff and waste server resources. Blackhole Pro helps to stop bad bots and save server resources for legit visitors.