Removing the virus itself is fairly trivial but it's doubtful anyone will be able to crack the encryption method they use to encrypt your data so unless you pay the ransom the data is as good as GONE. That's why it's important to have a good backup.
Exactly the point I was making, removal is trivial (doesn't get you very far) and protection is a constant race as it is recoded to avoid AV signature detection. I think it's been fairly well stated here people should have backups!