Money quote:
Apple has been promoting the safety and security of the App Store as it prepares to allow for alternate app marketplaces in the European Union, and allowing a fake password management app onto the App Store is not a good look.
And:
LastPass says that it is working to get the clone app removed from the App Store. Though LastPass published its alert yesterday, and presumably contacted Apple at the same time, the app remains in the App Store as of now.