HIGHApt
Verified
Europe / NATO

APT29 OAuth Consent Phishing Campaign Targets 14 NATO Governments

Thursday, March 26, 2026 at 10:00 AM UTC·Source: Microsoft Threat Intelligence

Updated: Friday, March 27, 2026 at 08:00 AM UTC

Executive Summary

APT29 compromises 500+ government accounts across NATO via malicious Azure app registrations requesting mail and file access.

Analysis

APT29 registers malicious Azure apps requesting mail.read and files.read permissions. Targets receive phishing from compromised legitimate government accounts. Once consent granted, persistent access without needing the password. Microsoft has revoked malicious apps and published IOCs.

Timeline

Discovered
Mar 18, 2026
Exploitation Detected
Mar 18, 2026
Published
Mar 26, 2026
Source Attribution

Originally published by Microsoft Threat Intelligence on Mar 26, 2026. Verified by: Microsoft, CISA, NATO CCDCOE.

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