Hackers find the dashboard highly engaging and any security loopholes there allows them to do significant damage so it is necessary to take extra care for protection.
Protect the wp-admin directory:
This is the central part of WP website. To secure this use password protect where the owners submit two passwords for access- one for admin area and the other for the login page.
Use SSL to encrypt data:
Secure admin panel with SSL certificate implementation. This way the data transfer becomes secure between server and browser.
Add user accounts with care:
Multiple people access to admin panel increases security threats. Use plugins for users to make their passwords secure.
Change the admin username:
Admin as the username for administrator main account is easy-to-guess username so change this as soon as possible.
Monitor your files:
Use plugins like iThemes Security or Wordfence to monitor website file changes.