- Microsoft mitigated a record 15.72 Tbps DDoS attack from the Aisuru botnet
- Aisuru, a Mirai-class IoT botnet, controls more than 300,000 compromised devices
- Microsoft warns that DDoS attacks will grow as IoT and Internet speeds increase
Microsoft has said it successfully mitigated “the largest DDoS attack ever observed in the cloud” after cybercriminals running the Aisuru botnet attacked a single endpoint, located in Australia.
The attack was a sight to behold: over 500,000 source IPs, across multiple regions, descended on the endpoint, delivering a multi-vector distributed denial of service (DDoS) attack that measured 15.72 Tbps and nearly 3.64 billion packets per second (pps).
Most of the supported devices are found on residential ISPs in the United States. According CyberInsiderIt now has more than 300,000 units committed.
Mitigate the assault
Microsoft described Aisuru as a “Turbo Mirai-class IoT botnet that frequently causes unprecedented DDoS attacks.”
Mirai is one of the largest and most popular botnets out there, persisting for almost a decade and typically works by infecting IoT and smart home devices, such as home routers, DVRs, webcams, smart speakers, TVs, and others, and then using your Internet access to flood its targets with meaningless traffic.
Although the attack was considered huge, Microsoft said it successfully mitigated it using Azure’s globally distributed DDoS protection infrastructure and its continuous detection capabilities.
“Malicious traffic was effectively filtered and redirected, maintaining uninterrupted service availability for customer workloads,” the company said.
Aisuru has been in the headlines recently, and game hosting provider Gcore was recently hit by what was, at the time, one of the largest DDoS attacks ever recorded.
Gcore said the event was a “short burst volumetric flood” that lasted between 30 and 45 seconds and peaked at 6 Tbps with 5.3 billion packets per second.
Gcore’s analysis revealed that 51% of the malicious data originated in Brazil and almost 24% came from the United States, and that the activity was consistent with Aisuru.
Microsoft doesn’t believe we’ve seen the worst of DDoS attacks yet. “Attackers are escalating with the Internet itself,” the report reads. “As fiber-to-the-home speeds increase and IoT devices become more powerful, the basis for attack size continues to increase.”
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