The malicious software hijacks Google and other search requests and redirects them to websites that pay the cyber criminals behind the scam for traffic.
Google users will now be greeted with a yellow warning at the top of their search results if they are affected, according to the security blog KrebsonSecurity.
Damian Menscher, a Google security engineer, said the malware appeared to find its way onto computers via fake anti-virus software, also known as scareware. Unsuspecting victims download the software, which then uses a vulnerability in Windows takes control of web searches. The Telegraph.