The US Federal Bureau of Investigation (FBI) says 49 organisations, including some in government, were hit by Cuba ransomware as of early November this year.
The attacks were spread across five "critical infrastructure", which, besides government, included the financial, healthcare, manufacturing, and – as you'd expect – IT sectors. The Feds said late last week the threat actors are demanding $76m in ransoms and have already received at least $43.9m in payments.
The ransomware gang's loader of choice, Hancitor, was the culprit, distributed via phishing emails, or via exploit of Microsoft Exchange vulnerabilities, compromised credentials, or Remote Desktop Protocol (RDP) tools. Hancitor – also known as Chanitor or Tordal – enables a CobaltStrike beacon as a service on the victim's network using a legitimate Windows service like PowerShell.