I've had two WordPress blogs hacked into formerly. That was in a time when I was doing virtually no internet advertising, and until I found time to deal with the situation (weeks later), these sites were penalized in the main search engines. They were not eliminated the ratings were reduced.
I back up my blogs regularly using a free plugin WP DB Backup. I will restore my blog to the last 13, if anything happens. I use my site to be scanned by WP Security Scan plugin that is free frequently and suspicious-looking requests to be blocked by WordPress Firewall to fix wordpress malware protection.
No software system is immune to bugs and vulnerabilities. Security holes will be discovered and men will do their best to exploit them. Keeping your software up-to-date is a good way once security holes are found because their products will be fixed by software vendors.
There is a section of config-sample.php that is headed"Authentication more info here Unique Keys." There are four definitions that appear within the block. There's a hyperlink within that section of code. You need to enter that link in your browser, copy the contents that you return, and then replace the keys you have with the unique, pseudo-random keys offered by the website. This makes it harder for attackers to automatically generate a"logged-in" cookie for your site.
You could get an SSL Encyption Security to your WordPress blogs. The SSL Security makes secure and encrypted communications with your site. You can keep history of communication and the all of the cookies so that all transactions are listed. Be certain all your sites get SSL security for protection from hackers.
Change your password, or admin username and your WordPress password and collect and use other fantastic WordPress security tips to keep hackers out!