Could you file a report with godaddy.com which is the registrar they are using. You can use either one:
- “Registrar Abuse Contact Email: abuse@godaddy.com”
- Report Abuse / select “Malware” block
- contact us: 1-480-366-3550 - 24/7 - GoDaddy Help Center - Contact Us
Point to your post here as well as this one - This program is stealing your private keys!
I filed such report (using the second link) a week ago and three of their websites were taken down for a while. Maybe if reports will be repeated, they will take more aggressive stance.