Krishwords

I am quoting the stats from the Google Online Security Team

We examined about 70,000 domains that over the past month have been either distributing malware or have been responsible for hosting browser exploits leading to drive-by-downloads. The breakdown by server software is depicted below.

Compared to our sample of servers across the Internet, Microsoft IIS features twice as often (49% vs. 23%) as a malware distributing server.