On Thursday security vendor McAfee reported that more than 20,000 Web pages have been affected by the attack. The pages are infected with malicious code that tries to install password-stealing software on the PCs of people who visit the sites.
Researchers are still not sure how the attackers are managing to hack these Web pages, but the pages all seem to use Microsoft's Active Server Page (ASP) technology, which is used by many Web development programs to create dynamic HTML pages. A software bug in any of those programs is all the attackers need to install their malicious code.
If the code is successful, it then installs a password-stealing program on the victim's computer that looks for passwords for a number of online games, including the "Lord of the Rings Online."
It's embarrassing when security vendors fall victim to the attacks they are supposed to prevent, but Trend Micro is not the only company to have had its Web site hacked in recent months. In January, parts of CA's Web site were infected with a very similar type of attack.
Source: IDG News Source