Google systems found more than 4,000 sites set up for distributing malware by massively compromising popular web sites. Of these, more than 1,400 were hosted in the .cn TLDs. Several contained plays on the name of Google such as goooogleadsence.biz, etc. The graph shows the top-10 malware sites, and also contains arrows indicating when these domains where first listed via the Safe Browsing API and flagged in our search results as potentially dangerous, explained.