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In a report, the software giant noted that the Azure DDOS Protection tool automatically detected and mitigated a multi-vector attack that peaked at 15.72 Tbps (Terabits per second – the biggest ever in history) and nearly 3.64 billion packets per second (pps). The attackers utilised extremely high-rate UDP floods launched from over 500,000 source IPs across various regions. The attack involved extremely high-rate UDP floods targeting a specific public IP address, launched from over 500,000 source IPs across various regions.
Microsoft has announced that it prevented the largest-ever cloud DDoS (distributed denial-of-service) attack on its Azure cloud services, which occurred in October. This record-breaking attack targeted a single customer endpoint in Australia. The massive attack was successfully absorbed and filtered by Azure’s globally distributed DDoS Protection infrastructure, ensuring uninterrupted service availability for the customer. The attack was traced back to the Aisuru botnet, a Turbo Mirai-class IoT botnet known for exploiting compromised home routers and cameras to launch high-scale attacks. This incident underscores the rising threat landscape, where attack sizes scale with advances in the internet, such as increased fibre-to-the-home speeds and more powerful IoT devices. The attack originated from the Aisuru botnet. Aisuru is a Turbo Mirai-class IoT botnet that frequently causes record-breaking DDoS attacks by exploiting compromised home routers and cameras, mainly in residential ISPs in the United States and other countries. These sudden UDP bursts had minimal source spoofing and used random source ports, which helped simplify traceback and facilitated provider enforcement.