There are millions of blogs. Money is being made by some people through it and some do not. Most of the bloggers use WordPress at the moment. You will need to make sure that your blog is protected.
Installing the fix malware problem Scan plugin alert you that you might have missed, and will check all this for you. It will also inform you that a user named"admin" exists. Needless to say, that is the administrative user name. You can follow a link and find instructions for changing that title, if you wish. I personally believe that a password is security that is good, and since I followed those steps, there have been advice no successful attacks on the several blogs that I run.
There are many ways to pull this off, and many involve re-establishing more and databases and FTPing files, exporting and copying. Some of them are very complex, so it's imperative 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.
Before you can delete the default admin account, you need to create a user with administrator rights. To do this go to your WordPress Dashboard and click on User -> Create New User. Then enter all the information you will need to enter.
Now we are getting into matters specific to WordPress. You have to rename it to config.php and modify the document config-sample.php, when you install WordPress. You need to set up the database facts there.
But realize that online security is. Do not just be the type that is reactive, take action to start today, protecting yourself. Don't let Joe the Hacker make your life miserable and turn everything that you've worked so hard in creating come crashing down in a matter of seconds.