Microsoft Azure thwarts largest cloud DDoS attack ever
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Microsoft Azure thwarts largest cloud DDoS attack ever
"On October 24, 2025, Azure DDoS Protection automatically detected and neutralized a multi-vector DDoS attack of 15.72 terabits per second and nearly 3.64 billion packets per second. Microsoft reported on the attack it had confronted on Monday. The attack was the largest ever observed in the cloud and targeted a single endpoint in Australia. Thanks to Azure's globally distributed infrastructure and continuous detection capabilities, the malicious traffic was immediately filtered and redirected, keeping customer services available."
"The attack was carried out by the Aisuru botnet, a Mirai-like IoT variant that has been active since August 2024 and has regularly caused record-breaking attacks since then. This is according to The Register, which also describes how Aisuru was responsible for a 6.3 Tbps attack on KrebsOnSecurity in June 2025, which Google said at the time was the largest the company had ever had to fend off."
On October 24, 2025, Azure DDoS Protection detected and neutralized a multi-vector DDoS attack measuring 15.72 terabits per second and nearly 3.64 billion packets per second that targeted a single endpoint in Australia. Azure's global infrastructure filtered and redirected the malicious traffic, keeping customer services available. The attack was launched by the Aisuru botnet, a Mirai-like IoT variant active since August 2024 that has produced multiple record attacks. Aisuru primarily infects home routers and security cameras on residential ISP networks. More than half a million source addresses across regions participated in extremely fast UDP floods with random source ports and minimal spoofing.
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