Beyond DKIM key rotation: understanding email replay attacks
AWS explains how adversaries replay legitimately DKIM-signed emails from unrelated IPs, bypassing standard authentication — a technique many SOC teams still lack specific detection rules for.
Summary written by editorial AI · Source link below
As the email administrator for your organization’s domain, you receive a Domain-based Message Authentication, Reporting, and Conformance (DMARC) aggregate report showing email passing DomainKeys Identified Mail (DKIM) verification as though it came from your domain, sent from IP addresses you don’t recognize to recipients you didn’t contact. To clear the issue, you rotate your DKIM […]
Editorial Analysis
Email replay attacks exploit trust in valid DKIM signatures, allowing phishing campaigns that pass authentication checks most organisations rely on as a primary defence.
Review DMARC reports for anomalous sending sources that pass DKIM and tighten SPF alignment to reduce the replay attack surface.
Forward-looking interpretation drafted by editorial AI under human review — not a reproduction of the source. See methodology.
External link — opens at AWS Security Blog in a new tab.
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