I have had two WordPress blogs. That was in a time when I was doing almost no internet 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 evaluations were reduced.
There's a part of config-sample.php that's led'Authentication Unique Keys.' You will find. A hyperlink is fix hacked wordpress database within that part of code.You must enter that link into your browser, copy the contents which you return, and change the keys you have with the specific keys given by the website. This makes it harder for attackers to rapidly generate a'logged-in' dessert for your site.
There are ways to pull this off, and a lot of them involve re-establishing much more and databases and FTPing files, exporting and copying. Some of these are very complicated, so it is important this content that you select the right one. Then you may want to check into using a plugin for WordPress backups if you are not of the persuasion that is technical.
It's a WordPress plugin. They are drop dead simple to install, have all the features you need for a job such as this, and are relatively inexpensive, especially when compared to having to hire someone to YOURURL.com have this done for you.
You may extend the plugin features with premium plugins such as: Amazon S3 plugin, Members only plugin, DropShop etc.. So I think you can use it at no cost and this plugin is a good choice.
Free software: If you have installed free scripts search Google for'wordpress security'. You'll get tips.