Re: Blockchain tracebility
As long as the transactions stay within the blockchain then it's reasonably anonymous. The ledger will just show that those ransom payments have been made to certain anonymous addresses.
The problem will arise when the miscreants try to convert their ill-gotten gains to either fiat currency or use them to buy other goodies. Half the security services in the world, as well as countless other people are going to be tracking exactly where each of those ransom payments goes from now on and will pounce as soon as anyone reveals the slightest connection to them.
If the hackers have two braincells to rub together, they'll not go near those coins, as they're the digital equivalent of radioactive waste now.