I have had two WordPress blogs hacked into in the past. That was at a time when I was doing very little internet marketing, and until I found time to address the situation (months later), these sites were penalised in the search engines. They were not removed, but the rankings were reduced.
Installing the how to fix hacked wordpress Scan plugin alert you to anything that you may have missed, and will check most of this for you. It will also tell you that a user named"admin" exists. That is your user name. If you desire, you can follow a link and find instructions for changing that title. I personally believe that there is a password protection that is good, and there have been no attacks on the blogs that I run, since I followed these steps.
No software system is resistant to bugs and vulnerabilities. Security holes will be discovered and bad guys 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 sellers that are reliable.
You should also place the"Anyone Can Register" in Settings/General to off, and you should have some type of spam plugin. Akismet is the one I use, the old standby, but there are many of them these days.
You can also create a firewall that blocks hackers from infiltrating your blogs. From coming into your files, the firewall prevents the hacker. You also have to have updated version of Apache. Upgrade your PHP as well. It is important that your system visit their website is always full of upgrades.
These are. Set a blank Index.html file in your folders, run your web host security scan and backup your whole account.