09/29/2026, 19.27
TrustSink: The Rogue MFA Attack Targeting Microsoft Entra
Varonis Threat Labs reveals TrustSink, a post-compromise technique using rogue external MFA providers to steal plaintext passwords during legitimate logins.
Key points
- TrustSink abuses Microsoft Entra's external MFA provider feature to capture plaintext passwords.
- Attackers must already possess high-level privileges, such as Global Administrator access.
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