As you’ve probably heard already (sorry, I’ve been slow on blogging today), Google has a new security blog.
And their first blog post makes an important point:
Unfortunately, the scope of the problem has recently been somewhat misreported to suggest that one in 10 websites are potentially malicious. To clarify, a sample-based analysis puts the fraction of malicious pages at roughly 0.1%. The analysis described in our paper covers billions of URLs. Using targeted feature extraction and classification, we select a subset of URLs believed to be suspicious for in-depth investigation. So far, we have investigated about 12 million suspicious URLs and found about 1 million that engage in drive-by downloads. In most cases, the web sites that infect your system with malware are not intentionally doing so and are often unaware that their web servers have been compromised.
You can read the Google Security Blog at http://googleonlinesecurity.blogspot.com/