No - you can't do this without a midi host when using USB.
Also, I cant tell whether you're talking about the Minibrute, because you posted this question in the minibrute forum, the minibrute2s, because you mistakenly referred to it as a microbrute2s, or a microbrute, because you also referred to it as that. Either way, I dont think you can use a USB midi controller to the USB ports on any of the hardware instruments without an intermediate device.