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Microsoft Defender for Office 365

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high advisory

ASCII Smuggling Repurposed for Phishing Evasion

Attackers are repurposing the ASCII smuggling technique, originally intended for AI prompt injection, to embed invisible Unicode tag characters into phishing emails to bypass keyword-based security filters.

Microsoft Defender for Office 365 phishing evasion unicode email-security
1r 2t
medium advisory

Detection of User-Reported Phishing or Malware in Office 365

This detection identifies potentially malicious emails reported by users within an Office 365 environment through Security & Compliance policies, indicating possible phishing or malware attacks targeting the organization.

Office 365 +2 office365 phishing user-reporting
2r 1t