CVE-2023-23397 - Microsoft Outlook EoP v1.0.5

This pack is part of the Rapid Breach Response pack.

CVE-2023-23397 - Critical Elevation of Privilege vulnerability in Microsoft Outlook

Summary

Microsoft Threat Intelligence discovered limited, targeted abuse of a vulnerability in Microsoft Outlook for Windows that allows for new technology LAN manager (NTLM) credential theft. Microsoft has released CVE-2023-23397 to address the critical elevation of privilege (EoP) vulnerability affecting Microsoft Outlook for Windows.

The playbook includes the following tasks:

Hunting:

• Microsoft PowerShell hunting script
• Advanced SIEM hunting queries
• Indicators hunting

Mitigations:

• Microsoft official CVE-2023-23397 patch
• Microsoft workarounds
• Detection Rules
  • Yara

References:

Microsoft Mitigates Outlook Elevation of Privilege Vulnerability
CVE-2023-23397 Audit & Eradication Script
Neo23x0 Yara Rules