Install the clean hacked wordpress site Firewall Plugin. This plugin investigates requests with WordPress-particular heuristics that are simple to identify and quit obvious attacks.
Basically, it will start with the fundamentals. Try to use complex passwords. Use letters, numbers, special characters, and spaces and combine them to make a unique password. You could also use usernames that are not obvious.
This official site is very handy plugin, protecting you against brute-force attacks that are password-crack. It keeps track of the IP address of every login attempt. You can configure the plugin to disable login attempts for a range of IP addresses when a certain number of attempts is reached.
Note that this step for new installations should try. You will also need to change all the table names inside the database if you would like to get it done for existing installations.
Oh . And incidentally, I talked about plugins. Make sure it's a secure one, when you get a plugin. Don't install any plugin because the owner is saying on his site that plugin can help you do this or that. Use maybe, or a test site to look at the plugin get a software engineer to examine it more helpful hints carefully. This way you'll know it isn't a threat for your business or you.