.htaccess - for compromised site

RewriteEngine On
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]

ErrorDocument 403     /cgi-sys/403_def.html

ErrorDocument 404     /cgi-sys/404_def.html

ErrorDocument 500     /cgi-sys/500_def.html

ErrorDocument 502     /cgi-sys/502_def.html

ErrorDocument 503     /cgi-sys/503_def.html

ErrorDocument 504     /cgi-sys/504_def.html