IS this someone hacking
my host has been disabling account because of high cpu, and this ip comes up everytime 89.28.4.79 , and running this process 21 times, 89.28.4.79 mysite.com /
wp-admin/admin-ajax.php?action=ajax-thumbsup
I blocked ip, what else should be done, please help
how do i determine causes of high cpu as well.