It is a scam. I searched the information for you and I saw the exact image as what you have told us on this website: http://www.onlinepcsavior.com/how-to-uninstall-mac-keeper-fake-anti-spyware-comp letely-get-rid-of-mac-keeper/
According to the website, you need to remove the following infections associated to fake Mac keeper:
/Applications/MacKeeper.app/Contents/MacOS
/Applications/MacKeeper.app/Contents
/Applications/MacKeeper.app/Contents/MacOS/MacKeeper
/Applications/MaKeeper.app/Contents/Info.plist
/Applications/MacKeeper.app/Contents/PkgInfo
/Applications/MacKeeper.app/Contents/Resources
/Applications/MacKeeper.app/Contents/Resources/AboutMBMI.png
/Applications/Mackeeper.app/Contents/Resources/affid.txt
/Applications/MacKeeper.app/Contents/Resources/About-Back.png
/Applications/MacKeeper.app/Contents/Resources/ControlCenterD.nib
/Applications/MacKeeper.app/Contents/Resources/AboutD.nib’