1.) Connect VPN + TOR in this arrangement: You -> TOR + VPN -> VPN -> destination
2.) do some google dorks for stolen credit card dumps.
3.) Buy BTC with them
4.) Send the BTC to another address in your wallet. Do this atleast 3 times.
5.) Send your BTC through a mixer service.
6.) Again, send your new mixed BTC to another address in your wallet. I'd say do it 3 times again. The more the better.
7.) Buy a virtual credit card with your BTC.
8.) Hire a VPS with that VCC. Use a fake identity if needed.
Also, don't care about the rest. Now ofc it is good to encrypt your malware connections to avoid IDS', but for anonymity? Well how are they going to trace it back? you used a fake identity, the transaction is pretty much untraceable, and you used your TOR + VPN setup so they can't track down your country either.
Also @dtm, did you call the wannacry creators skrubs? xD