Malwarebytes analyzed a new strain of malware that attempts to delete Chrome and replace it with a bogus version that allows attackers to hijack several file associations including HTML, JPG, PDF, and GIF. The eFast Browser is based on Googles Chromium open-source software, its appearance is not different from the legitimate Google Chrome, in this way it doesnt raise suspicion in the victims. The malware is developed by a company that calls itself Clara Labs, which is the author of similar browsers known as BoBrowser, Unico, and Tortuga.”]
Source: https://securityaffairs.co/wordpress/41245/malware/efast-browser-adware-chrome.html