Spring Ring: An Inside Look at Voice Phishing Campaigns in Microsoft Teams
Unit 42's Spring Ring analysis details how attackers weaponise Microsoft Teams voice calls to deploy malware and pivot to domain controllers—a social-engineering vector most EDR playbooks don't yet cover.
Summary written by editorial AI · Source link below
Learn how the Spring Ring campaign abuses Microsoft Teams and voice phishing to deploy malware and target enterprise domain controllers. The post Spring Ring: An Inside Look at Voice Phishing Campaigns in Microsoft Teams appeared first on Unit 42 .
Editorial Analysis
Most enterprises have hardened email phishing defences but lack equivalent controls for Teams-based vishing; this campaign shows adversaries exploiting that gap to reach high-value AD infrastructure.
Restrict external Microsoft Teams communication to allow-listed domains and add collaboration-platform telemetry to SOC monitoring scope.
Attackers are using Microsoft Teams voice calls—not email—to breach enterprises and reach domain controllers, exposing a gap in most phishing defences.
Forward-looking interpretation drafted by editorial AI under human review — not a reproduction of the source. See methodology.
External link — opens at Unit 42 (Palo Alto) in a new tab.
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