5 Signs That Authenticated API Traffic Is Actually Malicious
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95% of API attacks originate from authenticated sources, making them nearly invisible to standard security systems. Five behavioral signals can help detect malicious authenticated traffic: sequential resource enumeration (a BOLA indicator), anomalous login locations or access patterns, unusually high request volumes (especially 24/7 activity suggesting AI-driven attacks), unexpected bulk actions like mass data transfers, and elevated HTTP 4xx error rates indicating reconnaissance. Mitigations include identity-based user profiles to baseline normal behavior, triggering additional auth flows on anomalies, alerting on bulk actions, and applying least-privilege role-based access controls.
