The Cybersecurity and Infrastructure Security Agency (CISA), Federal Bureau of Investigation (FBI), and National Security Agency (NSA) published a cybersecurity advisory regarding BlackMatter ransomware cyber intrusions targeting multiple U.S. critical infrastructure entities, including two U.S. food and agriculture sector organizations. The advisory includes technical details, analysis and assessment of this cyber threat and several mitigation actions that can be taken to reduce the risk to this ransomware.