By Pierluigi Paganini
Publication Date: 2025-11-17 19:13:00
Microsoft mitigated the largest cloud DDoS ever recorded, 15.7 Tbps
November 17, 2025 
Microsoft says the Aisuru botnet launched a 15.7 Tbps DDoS on Azure from 500k IPs, using massive UDP floods peaking at 3.6 B pps.
On October 24, 2025, Azure DDoS Protection detected and mitigated a massive multi-vector attack peaking at 15.72 Tbps and 3.64 billion pps, the largest cloud DDoS ever recorded, aimed at a single Australian endpoint.
Azure’s global protection network filtered the traffic, keeping services online. The attack came from the Aisuru botnet, a Turbo Mirai-class IoT botnet using compromised home routers and cameras.
“On October 24, 2025, Azure DDOS Protection automatically detected and mitigated a multi-vector DDoS attack measuring 15.72 Tbps and nearly 3.64 billion packets per second (pps). This was the largest DDoS attack ever observed in the cloud and it targeted a single…
