Play Search Now, powered by http://www.playsearchnow.com is a long playing browser hijacker, that infects most browsers installed on your MacOS, including Safari, Google Chrome, and Mozilla Firefox. Outwardly it looks like a useful service similar to Yahoo.
Valusc.com is malicious software that comes to the PC without the user's consent. The main task of the developers of this program is the distribution of advertising content, namely, forcibly redirecting the user to third-party sites
Nitratory.com is one of the potentially unwanted programs, in particular, adware, significantly reducing the performance of the browser. After penetration, this changes the browser settings in such a way as to constantly redirect the user to third-party sites containing advertisements.
Search.searchmmd.com is a browser hijacker, which is a false search page that looks like popular analogs, such as Yaho, Google and Bing. Moreover, the developers claim that Search.searchmmd.com significantly improves the quality of browsing and search efficiency.
Search.safesearch.today is a misleading search page that pretends to be legitimate search engine. In reality, it was designed to earn profit generating traffic to Yahoo.com web-page. Thus, it redirects all your search queries to another search engine.