The feed of malware hashes and known malicious file paths observed in related attacks is available in both JSON and CSV formats at the below GitHub links. To aid defenders in investigating these attacks where Microsoft security products and tooling may not be deployed, we are releasing a feed of observed indicators of compromise (IOCs). Update : Microsoft continues to see multiple actors taking advantage of unpatched systems to attack organizations with on-premises Exchange Server. Update : Microsoft released a new one-click mitigation tool, the Microsoft Exchange On-Premises Mitigation Tool, to help customers who do not have dedicated security or IT teams to apply security updates for Microsoft Exchange Server. Update : Microsoft released updated tools and investigation guidance to help IT Pros and incident response teams identify, remediate, defend against associated attacks: Guidance for responders: Investigating and remediating on-premises Exchange Server vulnerabilities. SSO solution: Secure app access with single sign-on. Identity & access management Identity & access management.App & email security App & email security.
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