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Blue Security

Storm-0558 - Attack on Exchange Online

25 min • 17 juli 2023

On this week's episode, Adam and Andy talk Storm-0558, the China-based actor, that compromised Exchange Online. They go through the attack chain and CISA's guidance on how you can better protect your organization going forword.

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Youtube Video Link: https://youtu.be/N7dRPCCU25A⁠⁠⁠⁠⁠⁠⁠⁠

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Documentation: https://blogs.microsoft.com/on-the-issues/2023/07/11/mitigation-china-based-threat-actor/

https://www.microsoft.com/en-us/security/blog/2023/07/14/analysis-of-storm-0558-techniques-for-unauthorized-email-access/

https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-193a

https://learn.microsoft.com/en-us/compliance/assurance/assurance-audit-logging

https://learn.microsoft.com/en-us/microsoft-365/compliance/audit-log-enable-disable?view=o365-worldwide

https://learn.microsoft.com/en-us/microsoft-365/compliance/audit-premium?view=o365-worldwide

https://learn.microsoft.com/en-us/microsoft-365/compliance/audit-log-search?view=o365-worldwide

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Andy Jaw

Mastodon: ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠https://infosec.exchange/@ajawzero⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠

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Email: ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠[email protected]⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠

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Adam Brewer

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Email: ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠[email protected]

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