is this someone trying to hack my wp?

Someone from China been typing in url such as: mydomain.com/login, mydomain.com/register.php, [domain]/YaBB.cgi, [domain]/join.php, [domain]/signup.php, ucp. php?m ode=r egist er ,
[domain]/?do= /user /regi ster/ and some other variations of my url.

I’m not sure what the person is trying to do? The person’s been at it since yesterday and continues to do so overnight. Is there anything I should do? Thanks.