Secure a Cpanel with 4 domains

hello

i get all the time hacked and they add sub folders what destroy the ranking of the actuell domain

its 4 domains and I think they hack the cpanel or have upload files for get files on it

looking for someone what can run a scan and find the backdoor and secure all for good

comment if u can do and for how much

regards
mat

Are you on a shared hosting or a VPS?

Do secure the ftp accounts, add deny commands to htaccess, if your sites are WP secure them with better passwords. Or if you have a backup better do a clean install. That way it would be better. But do add the codes to your htaccess file to stop future hacks. This is how I stopped my sites getting compromised