data corruption with rnmb.net javascript

I have a SQL Server 2000 database that had its data corrupted. Any text field, usually varchar(50) or greater, had most of its text replaced with a script HTML tag pointing to a w.js file on rnmb.net. I think the update came in through a website (written in ASP.Net) because only one of the databases on the server had its data corrupted. Has anyone heard of this before? I can't find any information on this corruption on the internet because when I do a search for the exact script, it returns other websites that have been corrupted by it.
Here is a picture of the script (I won't post the actual text for obvious reasons):
http://rocketdaddyservices.com/virus_script.jpg