Largest ransomware attack ever through hacked Kaseya software by REvil. Thousands of victims in at least 17 countries. $70m asked to decrypt the lot.

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.

REvil was demanding ransoms of up to $5 million, the researchers said. But late Sunday it offered in a posting on its dark web site a universal decryptor software key that would unscramble all affected machines in exchange for $70 million in cryptocurrency.

Earlier, the FBI said in a statement that while it was investigating the attack its scale “may make it so that we are unable to respond to each victim individually.” Deputy National Security Advisor 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.

Less than a month ago, Biden pressed Russian President Vladimir Putin to stop giving safe haven to REvil and other ransomware gangs whose unrelenting extortionary attacks the U.S. deems a national security threat.

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CEO Fred Voccola of the breached software company, Kaseya, estimated the victim number in the low thousands, mostly small businesses like “dental practices, architecture firms, plastic surgery centers, libraries, things like that.”

Voccola said in an interview that only between 50-60 of the company’s 37,000 customers were compromised. But 70% were managed service providers who use the company’s hacked VSA software to manage multiple customers. It automates the installation of software and security updates and manages backups and other vital tasks.

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The cybersecurity firm ESET identified victims in least 17 countries, including the United Kingdom, South Africa, Canada, Argentina, Mexico, Indonesia, New Zealand and Kenya.

Kaseya says the attack only affected “on-premise” customers, organizations running their own data centers, as opposed to its cloud-based services that run software for customers. It also shut down those servers as a precaution, however.

Kaseya, which called on customers Friday to shut down their VSA servers immediately, said Sunday it hoped to have a patch in the next few days.

Active since April 2019, REvil provides ransomware-as-a-service, meaning it develops the network-paralyzing software and leases it to so-called affiliates who infect targets and earn the lion’s share of ransoms. U.S. officials say the most potent ransomware gangs are based in Russia and allied states and operate with Kremlin tolerance and sometimes collude with Russian security services.

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Source: Scale, details of massive Kaseya ransomware attack emerge

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