FILE - This Feb 23, 2019, file photo shows the inside of a computer in Jersey City, N.J. Cybersecurity teams worked feverishly Sunday, July 4, 2021, to stem the impact of the single biggest global ransomware attack on record, with some details emerging about how the Russia-linked gang responsible breached the company whose software was the conduit. An affiliate of the notorious REvil gang, infected thousands of victims in at least 17 countries on Friday, largely through firms that remotely manage IT infrastructure for multiple customers, cybersecurity researchers said. (AP Photo/Jenny Kane, File)
(AP) — The single biggest global ransomware attack yet continues to bite as more details emerge on how a Russia-linked gang breached the company whose software was exploited. In essence, the criminals used a tool that helps protect against malware to spread it widely. Thousands of victims have been identified in at least 17 countries, with ransom demands of up to $5 million reported. The attack comes less than a month after President Joe Biden pressed Russian President Vladimir Putin to stop providing safe haven to ransomware gangs including the one responsible for the latest attack.