https://www.reuters.com/article/us-mexico-pemex/ransomware-attack-at-mexicos-pemex-halts-work-threatens-to-cripple-computers-idUSKBN1XM041

A ransomware attack hit computer servers and halted administrative work on Monday at Mexican state oil firm Pemex, according to employees and internal emails, in hackers' latest bid to wring ransom from a major company.