Is there a name for liquor that might have been produced legally, or using professional technologies, but then has been smuggled, either bypassing customs, or into prohibition area and/or is being sold illegally?
"Moonshine" is the common name for suspicious quality liquor made using makeshift, illegal still, but that usually implies local, unprofessional production. "Contraband" is the general name for smuggled, illegal goods, not just liquor.