I think the search is conservative. Only 5%? Well, the information is from Google....
Malware which place unwanted ads on websites are one of the blows the most effective of the internet. And old, too. Even so, according to a Google search and the University of california, Berkeley, in the United States, the scam infects more than five million users around the world.
This type of virus, called adware, works in the following way: once a computer is infected, the virus inserts the ads on any site that the user visits, making the hackers who control the malware to make money with the advertising revenue generated by page views on the page infected.
The study has made a research with computers visited Google sites, between June and October 2014, verifying whether the fake ads were being “injected” by the systems on these pages.
During these five months, the system detected more than 5 million IP addresses infected with adware, almost 5.5% of the total requests. According to the study, the number may be even higher. This is because the adware programs avoid inserting ads on the websites of major companies, to not be detected by them.
The survey also showed that the adware Superfish is still active and infecting computers around the world. The Superfish was present in more than 3.7 million pageviews. The program became known after being discovered in some computers from Lenovo, pre-installed, breaking the security protocols of any computer infected with it.
Other of the programs found by the researchers were the Jollywallet, Crossrider, and Netcrawl.
Google started a war against the adware in the last few months. In April, the company stopped accepting ads from companies that throw sofwares free for desktops, such as WinZip and VLC. This is because, usually, the adware enters your computer through these programs.
Source: Info April