CISA Issues Emergency Directive 24-02: Mitigating the Significant Risk from Nation-State Compromise of Microsoft Corporate Email System

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CISA Issues Emergency Directive 24-02: Mitigating the Significant Risk from Nation-State Compromise of Microsoft Corporate Email System

Today, CISA publicly issued Emergency Directive (ED) 24-02 to address the recent campaign by Russian state-sponsored cyber actor Midnight Blizzard to exfiltrate email correspondence of Federal Civilian Executive Branch (FCEB) agencies through a successful compromise of Microsoft corporate email accounts. This Directive rhttps://www.cisa.gov/news-events/directives/ed-24-02-mitigating-significant-risk-nation-state-compromise-microsoft-corporate-email-systemequires agencies to analyze the content of exfiltrated emails, reset compromised credentials, and take additional steps to secure privileged Microsoft Azure accounts.

While ED 24-02 requirements only apply to FCEB agencies, other organizations may also have been impacted by the exfiltration of Microsoft corporate email and are encouraged to contact their respective Microsoft account team for any additional questions or follow up. FCEB agencies and state and local government should utilize the distro MBFedResponse@Microsoft.com for any escalations and assistance with Microsoft. Regardless of direct impact, all organizations are strongly encouraged to apply stringent security measures, including strong passwords, multifactor authentication (MFA) and prohibited sharing of unprotected sensitive information via unsecure channels.

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