Hackers trying to hacking your WordPress application websites, there are some steps to be secured, Open the wp-config.php file and update to chmod files and folders for you.
Move wp-config.php above the your website document root directory (public_html).
then, get a robots.txt file correctly configured and a WP security plugin
then create a file name with .htpasswd to block access to wp-admin and wp-login.php
Get file from http://codex.wordpress.org/Editing_wp-config.php