https://www.bleepingcomputer.com/news/security/mexicos-pemex-oil-suffers-ransomware-attack-49-million-demanded/

Mexico's state-owned oil company, Pemex, has suffered a DoppelPaymer ransomware attack that demanded $4.9 million USD in order to decrypt their files. 

On Sunday, November 10th, Pemex was hit with a ransomware attack that the company states affected less than 5% of their computers. Workers reported, though, that internal memos told them not to initially turn on their computers, but were up and running again later in the day on Monday.