F-Secure said on Friday that it was aware of seven sites that had been defaced by the worm, which appears designed to combat theMikko Hypp?nen, director of antivirus research at F-Secure, said that although the worm may seem beneficial, in fact it is likely to cause problems for administrators who will have to handle the increase in traffic. worm. The anti-Santy worm searches Google for sites that use the PHP Bulletin Board (phpBB) software exploited by the earlier worm, infects the sites and attempts to make the sites more secure by installing a patch.
"I can't comment how effective it is in fixing the sites," said Hypp?nen. "If a site is infected, the worm causes a huge amount of traffic and slows down the site. I don't think it's possible to write a beneficial worm." Sites that have been attacked by the anti-Santy worm are defaced with the words: "viewtopic.php secured by Anti-Santy-Worm V4. Your site is a bit safer, but upgrade to >= 2.0.11." Hypp?nen said he has seen two versions of the defacement page, which lead to two different IP addresses. Both IP addresses resolve to Argentina, which suggest that that is where the anti-Santy worm originated.