What is BoBrowser?
The Malwarebytes research team has determined that BoBrowser is actually a mix of programs designed to hijack your browser(s) and stop you from changing the settings back.
These so-called “hijackers” manipulate your browser(s), for example to change your startpage or searchscopes, so that the affected browser visits their site or one of their choice. In this case the hijack was to istartsurf.com. This one also replaces all the shortcuts to Chrome with its own shortcuts.
Typically you will see a mix of detections: PUP.Optional.BoBrowser.A, PUP.Optional.IStartSurf.A, PUP.Optional.WindowsProtectManger.A, PUP.Optional.XTab.A, PUP.Optional.IHProtect.A, PUP.Optional.FastStart.A and more.