- Microsoft mitigated record 15.72 Tbps DDoS attack from Aisuru botnet
- Aisuru, a Mirai-class IoT botnet, controls over 300,000 compromised devices
- Microsoft Warns DDoS Attacks Will Grow as IoT and Internet Speeds Increase
Microsoft said it successfully mitigated “the largest ever cloud DDoS attack” after cybercriminals running the Aisuru botnet targeted a single endpoint, located in Australia.
The attack was a sight to behold: over 500,000 source IP addresses, across various regions, descended on the endpoint, triggering a multi-vector distributed denial of service (DDoS) attack measuring 15.72 Tbps and nearly 3.64 billion packets per second (pps).
The majority of similar devices are found with residential ISPs in the United States. According to CyberInsiderthere are now more than 300,000 compromised units.
Reduce aggression
Microsoft described Aisuru as a “Turbo Mirai-class IoT botnet that frequently causes record DDoS attacks.”
Mirai is one of the largest and most popular botnets, existing for almost a decade, that typically works by infecting IoT and smart home devices, such as home routers, DVRs, web cameras, smart speakers, TVs, and others, and then using their Internet access to flood their targets with unnecessary traffic.
Although the attack was considered huge, Microsoft said it successfully mitigated it using Azure’s globally distributed DDoS protection infrastructure and continuous detection capabilities.
“Malicious traffic was effectively filtered and redirected, thereby maintaining uninterrupted service availability for customer workloads,” the company said.
Aisuru has been in the news recently, with game hosting provider Gcore recently hit by what was, at the time, one of the largest DDoS attacks on record.
Gcore said the event was a “short-lived volumetric flood” lasting between 30 and 45 seconds and peaking at 6 Tbps with 5.3 billion packets per second.
Gcore’s analysis found that 51% of the malicious data came from Brazil and almost 24% from the United States, and that the activity was consistent with Aisuru.
Microsoft doesn’t think it’s seen the worst DDoS attacks yet. “Attackers are evolving with the Internet itself,” the report said. “As fiber-to-the-home transmission speeds increase and IoT devices become more powerful, the base size of attacks continues to increase.”
Via BeepComputer
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