cosmosearch.ru is categorized as a browser hijacker which will bring in many ads on your browsers page and enable a bunch of adware on your browsers. cosmosearch.ru, sometimes, disguises as a search engine and all the components on it will be recognized as a normal search site. For example, on the surface it will attach tabs about Facebook, Twitter, or other social chatting sites. Therefore, users are not that easy to detect cosmosearch.ru as a browser hijacker.
cosmosearch.ru generated from potentially unwanted program (PUP), and it will make various ads on your browsers. And it enters your PC with porn websites, spam email, freeware installer and fake software update links. And if you skip any steps when you are surfing net, you make it possible to come into your PC. It seems even impossible for anyone to escape from adware infection.