A ransomware has the ability to restore its modification such as (restoring the MBR like in the 2016 Petya, or decrypting files if the victim pays) — a wiper would simply destroy and exclude possibilities of restoration. Left (2017 Petya) with the wiper code — Right (2016 Petya) which reads and encode sector blocks. The fact of pretending to be a ransomware while being in fact a nation state attack — especially since WannaCry proved that widely spread ransomware aren’t financially profitable — is in our opinion a very subtle way from the attacker to control the narrative of the attack.