From 2-spyware.com
SettingsModifier:Win32/HostsFileHijack is a heuristic detection name given to a particular malware by anti-malware solutions, such as Window Defender. Malware can be distributed in various methods by cybercriminals, including spam emails, adware bundle packages, drive-by downloads,[1] vulnerabilities, cracks/keygens, etc. Once inside the system, the virus begins to perform changes to the targeted computer.