htaccess hack

I just noticed I had several htaccess files uploaded to my
wp-content
uploads
and upload sub folders

The htaccess files had a redirect going to a URL looking something like this 84f6a4eef61784b33e4acbd32c8fdd72 . com

I’ve deleted the files now, but I was wondering if this is a WP problem or hosting problem. I’ve contacted my host and am awaiting a response.

Is there anything else I can do in the meantime?

thanks

Using WordPress 3.0.1
upgrading now.