Ransomware attack at Mexico's Pemex halts work, threatens to cripple computers

MEXICO CITY (Reuters) - 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.Hackers have increasingly targeted companies with malicious programs that can cripple systems overseeing everything from supply chains to payments to manufacturing, removing them only after receiving substantial payments.An internal email seen by Reuters..