Massive 15.7 Tbps DDoS Hits Microsoft's Azure, Traced to Aisuru Botnet

Pcmag • November 18, 2025

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The attack used traffic from over 500000 IP addresses to try and hit a single target based in Australia, according to Microsoft.

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Microsoft Azure Faces 15.7 Tbps DDoS Attack from Aisuru Botnet Microsoft Azure was targeted by a DDoS attack reaching 15.72 Tbps, launched from over 500,000 IP addresses by the Aisuru botnet. The attack utilized high-rate UDP floods, specifically targeting a public IP address in Australia, and peaked at nearly 3.64 billion packets per second. 22 sources 42

Extracted Entities

Attack Types (1)

Companies (2)

Azure Microsoft

Countries (1)

Malware (1)