Bottom line: A high-ranking official of the Ryuk ransomware gang was sentenced to 2 years in prison.
What's happening: Kolya Kozlov, an Armenian national, was extradited from Ukraine to the United States last year. He pleaded guilty to cybercrimes in July. The case involved the distribution of the Ryuk ransomware variant (CVE-2020-4234) in 2020.
What to do: Security leaders should ensure their networks are patched against the Ryuk variant, which has a CVSS score of 8.5. They should also increase monitoring and incident response capabilities to detect and respond to similar attacks.