Installing the fix wordpress malware attack Scan plugin will check most of this for you, and alert you that you may have missed. It will also inform you that a user named"admin" exists. Needless to say, that is the user name. If you desire, you can follow a link and find instructions for changing that title. Personally, I believe that a password is security that is good, and there have been no successful attacks on the several sites that I run, since I followed those steps.
This is great news as it means that there is a community of developers and users that could further enhance the platform. However there is a significant group there'll always be people who will attempt to take them down.
So what is the solution you should choose? Out of all of the possible options you can make, which one should you choose and which one is right for you right now?
BACK UP your site regularly and keep a copy on your computer and storage. Back For those who have a website that is very active. You spend a whole lot of time and money on your website, do not skip this! Is BackupBuddy, no back up plugins, widgets, your documents and database. Need to move your site this will do it!
Implementing all of the above will take less than you could try this out an hour to finish, while making your WordPress site more resistant to intrusions. Websites were this past year, largely due to easily preventable security gaps. Have yourself prepared and you're likely to be on the safe side.