John Hammond of Huntress Labs, one of the first cybersecurity firms to sound the alarm on the attack, said he'd seen $5 million and $500,000 demands by REVil for the decryptor key needed to unlock scrambled networks.
Kaseya ransomware attack by REvil affiliate called biggest on record
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Hammond of Huntress said he was aware of four managed-services providers - companies that host IT infrastructure for multiple customers - being hit by the ransomware, which encrypts networks until the victims pay off attackers.
Ransomware hits hundreds of U.S. companies, security firm says
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