Scale, details of massive Kaseya ransomware attack emerge

Cybersecurity teams worked feverishly Sunday 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, best known for extorting $11 million from the meat-processor JBS after a Memorial Day attack, 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. They reported ransom demands of up to $5 million.

The FBI said in a statement Sunday that it was investigating the attack along with the federal Cybersecurity and Infrastructure Security Agency, though "the scale of this incident may make it so that we are unable to respond to each victim individually." Deputy National Security Adviser Anne Neuberger later issued a statement saying President Joe Biden had "directed the full resources of the government to investigate this incident" and urged all who believed they were compromised to alert the FBI.

Biden suggested Saturday the U.S. would respond if it was determined that the Kremlin is at all involved.

The attack comes less than a month after Biden pressed Russian President Vladimir Putin to stop providing safe haven to REvil and other ransomware gangs whose unrelenting extortionary attacks the U.S. deems a national security threat.

A broad array of businesses and public agencies were hit by the latest attack, apparently on all continents, including in financial services, travel and leisure and the public sector — though few large companies, the cybersecurity firm Sophos reported. Ransomware criminals break into networks and sow malware that cripples networks on activation by scrambling all their data. Victims get a decoder key when they pay up.

The Swedish grocery chain Coop said most of its 800 stores would be closed for a second day Sunday because their cash register software supplier was crippled. A Swedish pharmacy chain, gas station chain, the state railway and public broadcaster SVT were also hit.