The chief executive of one of Europe’s biggest insurance companies has warned that cyber attacks, rather than natural catastrophes, will become “uninsurable” as the disruption from hacks continues to grow.

The settlement last week in a $100 million lawsuit over whether insurance giant Zurich should cover losses Mondelez International suffered from NotPetya may very well reshape the entire cyber insurance marketplace. Zurich initially denied claims from Mondelez after the malware, which experts estimate caused some $10 billion in damages globally, wreaked havoc on its computer networks. The insurance provider claimed an act of war exemption since it’s widely believed Russian military hackers unleashed NotPetya on a Ukrainian company before it spread around the world.

In the context of an internationally coordinated operation against a ransomware group, the Zurich Public Prosecutor’s Office is leading criminal proceedings against an accused person. At the same time, cyber investigators of the Zurich Cantonal Police have been intensively analysing the data storage devices seized from that person in the past months. This analysis has revealed numerous private keys. They enable the aggrieved companies to recover their encrypted data.