I don't know if MacBooster is malware (it probably is adware at the least), but it is absolutely a waste of money. It does absolutely nothing that isn't already built into the system... with the exception of a virus scanner—which is still largely unnecessary on the Mac. Yes, I know viruses exist for the macOS, but there hasn't been one of any size or consequence in the wild since the pre-Mac OS X days.
installing Malwarebytes is a mistake as well, as it's no better than MacBooster. You would simply be trading one piece of junk rip-off for another.
Learn how the OS works, learn where it installs software and learn how to avoid the problems in the future... you'll save yourself a whole lot of time, grief, and money. Daemon files are fairly easy to remove yourself, I would help you but I don't have MacBooster installed, so I don't know exactly what it installs and where.