CISA: CISA, FBI, NSA, MS-ISAC Publish Updated #StopRansomware Guide . “The Cybersecurity and Infrastructure Security Agency (CISA), Federal Bureau of Investigation (FBI), National Security Agency (NSA), and Multi-State Information Sharing and Analysis Center (MS-ISAC) today published the #StopRansomware Guide—an updated version of the 2020 guide containing additional recommended actions, resources, and tools.”