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Well-known hacker collective REvil Group is behind the cyberattack on Brazil's JBS SA, according to a source speaking to CNBC on the condition of anonymity.
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Bleicher, managing director at cybersecurity consulting firm Arete Incident Response, is a specialist who helps companies deal with ransomware the type of cyberattack in which hackers lock up a company s computers and then demand payment to undo the encryption.
He has given CNBC a rare and exclusive look inside a shadowy world where American companies find themselves paying millions of dollars to known criminals.
It s a corner of the criminal underworld that has seen explosive growth. According to a report by Chainalysis, the total amount paid by ransomware victims increased by 336% in 2020 to reach nearly $370 million worth of cryptocurrency.
And some big players are scoring huge gains: The report found the digital hostage-takers are dominated by large players who are raking in millions of dollars a year. Just 199 cryptocurrency deposit addresses receive 80 percent of all funds sent by ransomware addresses in 2020, Chainalysis found.