The sanctions on Iran don't prevent them from transfering money to most of the world, and 80 million dollars is pocket change for almost every single country.
They could have the money on a Cayman Islands or Swiss account by the end of the day, the problem is living long enough to spend it.
Look for example at the EU Sanctions, they impact around 270 individuals and organisations, but allow Iran to conduct legitimate business. The problem is that 80 million is relatively easy to pay in the middle of some of the legitimate business.