I have had two WordPress blogs hacked into previously. That was at a time when I was doing virtually no online advertising, and until I found time to handle the situation (weeks later), these sites were penalized in the major search engines. They weren't eliminated, however the evaluations were reduced.
Finally, fix hacked wordpress site will also inform you that there is no htaccess inside the directory. You can place a.htaccess record into this directory if you would like, and you can use it to manage usage of the wp-admin directory by Ip Address address or address range. Details of how you can do this are plentiful around the internet.
No software system is immune to vulnerabilities and bugs. Security holes will be discovered and bad men will do their best to exploit them. Keeping your software up-to-date is a good way to stave off attacks, once security holes are found, because their products will be fixed by software sellers.
First in line is currently creating a smarter password to your account. Passwords must be made with characters and numbers. You a knockout post can combine them and make plus shifted letters. Smarter passwords can be your gateway to zero hackers. Make passwords that are difficult that only you can consider.
Make a note of your new password! I recommend the paid or free version of the software that is protected *Roboform* to remember your passwords.
Don't use great site wp_. That default is being eliminated by most web hosting providers now but if yours does not, adjust wp_ to anything else but that.