Microsoft Azure Blocks 15.72 Tbps Aisuru Botnet DDoS Attack

Microsoft Azure halted a record 15.72 Tbps DDoS attack from the Aisuru botnet exposing risks created by exposed home devices exploited in large-scale cyber attacks.

On October 24, 2025, Microsoft Azure weathered the largest Distributed-Denial-of-Service (DDoS) attack ever recorded in the cloud. This massive digital assault, peaking at 15.72 Terabits per second (Tbps) and nearly 3.64 billion packets per second (pps), targeted a single endpoint in Australia.

Fortunately, according to Microsoft, its Azure global protection system automatically caught and filtered out the flood, keeping the customer’s services fully operational.

The Growing Aisuru Threat

The attack originated from the Aisuru botnet, which security firm Netscout calls a “Turbo Mirai-class” threat, which means the botnet can generate multi-TB/sec and -gpps direct-path DDoS attacks.

Aisuru, first spotted in August 2024, has since infected at least 700,000 IoT systems, such as home routers and security cameras. Its scale ...