Godaddy user here too.
Found a file floating suddenly under WP root that was modified 2 days ago. My backup doesn’t show the file, so I yanked it and WP still works. Got worried and found the same guy as admin “systemwpadmin” with a id88888.
No idea what to do next. Think I’ll just kill WP off my site forget all about it and move back to my IPB forum.
File modified was wp-functions, located under the wordpress root folder.