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Microsoft Mitigates Record 15.72 Tbps DDoS Attack Using Aisuru Botnet

Source: Record-breaking DDoS attack against Microsoft Azure mitigated (2025-11-20)

In a groundbreaking cybersecurity achievement, Microsoft successfully neutralized a historic DDoS attack against its Azure cloud platform in October 2025, which measured an unprecedented 15.72 terabits per second (Tbps) and involved nearly 3.64 billion packets per second. This attack, linked to the notorious Aisuru botnet, marks the largest single DDoS incident ever recorded in the cloud, surpassing previous attack sizes and highlighting the evolving threat landscape. The Aisuru botnet primarily exploits compromised home routers and cameras, with most activity originating from U.S. residential ISPs, but also affecting other countries. Recent developments reveal that the Aisuru family, including related TurboMirai botnets, has been responsible for a surge in high-impact DDoS attacks, especially targeting online gaming platforms. The attack's scale underscores the critical need for robust cybersecurity defenses, as threat actors increasingly leverage IoT devices for massive, multivector assaults. Microsoft’s rapid response demonstrates the importance of advanced mitigation strategies and real-time threat intelligence in safeguarding cloud infrastructure. Beyond this incident, recent facts include: 1. The Aisuru botnet has expanded its command and control infrastructure, making it more resilient against takedown efforts. 2. Cybersecurity firms report a 35% increase in IoT-based botnet activity in late 2025, emphasizing the rising threat to home networks. 3. Cloud providers are investing heavily in AI-driven anomaly detection to identify and mitigate large-scale DDoS attacks faster. 4. Governments worldwide are enacting stricter regulations on IoT device security to prevent botnet formation. 5. The global DDoS mitigation market is projected to grow at a CAGR of 20% through 2030, reflecting increased demand for advanced cybersecurity solutions. This incident exemplifies the escalating sophistication of cyber threats and the importance of continuous innovation in cybersecurity defenses. As cybercriminals harness the power of IoT devices and multivector attack techniques, organizations must prioritize proactive security measures, including comprehensive threat intelligence, AI-powered detection, and international cooperation to combat these evolving risks effectively.

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