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Symantec identifies 'Dirtiest Web Sites of Summer'

Symantec has come out with a list of the "Dirtiest Web Sites of Summer 2009," which, on average, has 18,000 malware threats per site.

Symantec is out with its "Dirtiest Web Sites of Summer 2009," which it's calling "the worst of the worst" when it comes to malware threats.

The security vendor says that "48 percent of the Dirtiest Web Sites are, well, dirty--sites that feature adult content." That means that more than half the sites cover a wide range of other categories including legal services, catering, figure skating, and electronics shopping, according to the report.

On average, sites on the dirtiest list have 18,000 threats per site, but 40 of the sites have in excess of 20,000 threats. One site that appears to offer restaurant catering services has 23,414 computer threats

"The number of web attacks is off the charts because it's the easiest path into a consumer's machine" said Gerry Egan, Symantec's director of security response.

Symantec's Safe Web rates sites for safety Symantec

The Web, said Egan "has become the primary delivery vehicle for malware." One method for infection is "drive by downloads," which can exploit a vulnerability in your browser or operating system by "leveraging little security holes" and injecting code into your machine simply by virtue of your visiting the site. Another route to infections is social engineering where someone tricks a user into installing a malicious application that can masquerade as a plug-in to play media or even a fake security program that claims to help you find and remove malware. Instead it installs malware on your machine.

There are a number of dastardly payloads associated with the type of malware delivered through these sites including turning your machine into a "spambot" that sends junk e-mail to other people. Such programs can also hijack your computer to be part of a "botnet" to carry out attacks on other systems such as the recent denial-of-service attack that brought down Twitter earlier this month.

Symantec has identified these dirty sites as part of the ongoing analysis it does for its Norton Safe Web product. Safe Web includes a free Web site that anyone can use to see if a site is known to have malware. In addition, Symantec's security products now come with a plug-ins that works with a browser to look over your shoulder while you're surfing or searching to warn you before visiting a site known to contain malware.

TrendMicro Internet Security has a feature that warns you if you are about to visit a site that "may put your security at risk" and McAfee offers a service called McAfee Site Advisor that includes a free plug-in for Firefox and Internet Explorer that warns you about potentially dangerous sites that show up in search results.

Podcast: Larry speaks with Symantec's director of security response, Gerry Egan (8:43)