Mysterious Monolith 3D print model

This mysterious file had appeared in my computer and duplicated itself into a bunch of formats. When i run it in a slicer it turned out to be an alien monolith!

Seems like it is designed pretty small for fast erection and easy transport, it is roughly 20mm wide and 80mm tall and takes 1,5hr to print in an average FDM printer.

These monoliths can be placed everywhere as you can see in the images, so go ahead and surprise your friends by spawning mysterious objects in their printers ... uhh i mean aliens, it was aliens all along.