In a post on its Microsoft Security Response Centre, director Mike Reavey said that Internet Explorer was used to target sophisticated attacks against Google and possibly other corporate networks.
Reavey warned companies should be wary of potential security issues and make sure that their security software is up-to-date. He advised organisations to follow defence-in-depth best practices and deploy multiple layers of protection to improve their security posture.
Following the attacks, which targeted human rights activists and were believed to have originated in China, Google said that is was no longer willing to censor its search results in the country. The claim is likely to mean that Google's entire Chinese operation will shut, as the Chinese government is very strict about what information its citizens can access online.