Microsoft’s Azure has successfully mitigated the largest cloud DDoS attack ever recorded—an enormous 15.72 Tbps, 3.64 billion packets-per-second assault. The attack, which targeted a single public endpoint in Australia, underscores the escalating capabilities of modern botnets and the need for proactive resiliency across cloud environments.
Botnet Behind Massive Attack Surge
According to Microsoft, the attack originated from Aisuru, a Turbo-Mirai–class IoT botnet known for leveraging compromised consumer devices such as routers and IP cameras. With over 500,000 unique source IP addresses, the botnet unleashed sustained UDP floods with minimal source spoofing—an approach that enabled Microsoft to trace origins and collaborate with upstream providers.
The ongoing growth of high-bandwidth home internet and increasingly capable IoT hardware is fueling a steady rise in attack ceilings. As Microsoft notes, today’s DDoS campaigns scale with global connectivity itself.
Mitigation Through Distributed Cloud Defense
Azure’s globally distributed DDoS Protection platform automatically detected the attack, rerouting and filtering harmful traffic in near real time. Customer workloads remained uninterrupted illustrating the value of cloud-native, multi-vector defense layers that adapt at machine speed.
Microsoft urges organizations to review their DDoS posture ahead of the holiday season, when attack volumes historically spike.
Regular stress testing, architectural reviews, and automated response planning are essential to maintaining availability in the face of rapidly scaling threat actors.
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