I've had two WordPress blogs. That was at a time when I was doing almost no online marketing, and until I found time to deal with the situation (weeks later), these sites were penalized in the major search engines. They were not eliminated the ratings were reduced.
The fix wordpress malware removal Codex has an outline of what permissions are acceptable. Directory and file permissions can be changed either via an FTP client or within the page from the web host.
Do not depend on your internet host - Many people rely on their web host to"do all that technical stuff for me", not realizing you can try these out that sometimes, they do not! Far better to have the responsibility lie instead of from your control.
Move your wp-config.php file up one directory from the WordPress root. WordPress will search for it there if it cannot be found in the main great post to read directory. Additionally, nobody will be able to read the file unless they have SSH or FTP access.
Now we are getting into things specific to WordPress. Whenever you install WordPress, you have to edit the document config-sample.php and rename it to config.php. You need to set up the database details there.
Don't use wp_ as a prefix for your own databases. Most web hosting Visit This Link providers are currently removing that default now but if yours doesn't, fix wp_ to anything but that.