For a few hours late last week, visitors to the Bank of India Web site had their browsers covertly redirected to a site hosting malicious exploits. Increasingly, criminals, often without any technical experience, are defacing popular Web sites with code that allows them to direct your browser to download content without you even knowing. Finjan, a security company that's been on the cutting edge of detecting Web 2.0 malware, identifies 10 toolkits for sale on the Internet, up from earlier this year. If you are an online criminal these days, says Yuval Ben-Itzhak, CTO of Finjan, "you are buying a...