You may use this trick for adding an additional layer of security on your WordPress site so that your site don’t get compromised and hacked:

1. Open your cPanel.
2. From Security section click Password Protect Directories.
3. Now on the Pop Up. Select root then from your WordPress installation select wp-admin.
4. Check Password protect this directory.
5. Create a user for that directory; there is an option below the check box. That’s it..

Now anytime you visit wp-admin directory you should notice an authentication box asking you for the username and password for authentication.

Sometimes it may show some errors depending on how your server is configured. Don’t worry, just ask me here about the problem(if you face one).