Microsoft: DDoS attack at 2,4 terabytes per second

Microsoft said that the Azure cloud service managed to stop a DDoS attack that reached 2,4 terabytes per second (Tbps).

The attack took place in late August, and was the largest DDoS attack ever recorded.

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Amir Dahan, Senior Program Manager for Azure Networking, said the attack was carried out using a botnet with about 70.000 bots located mainly in the Asia-Pacific region, such as Malaysia, Vietnam, Taiwan, Japan and China. as well as in the United States.

Dahan did not say much about the target of the attack as he described him only as an "Azure customer in Europe".

A Microsoft spokesman said the record-breaking DDoS attack came in three waves over a period of ten minutes, with the first at 2.4 Tbps, the second at 0.55 Tbps and the third at 1.7 Tbps. He added that Microsoft mitigated the attack without dropping Azure.

Prior to Microsoft's revelation, the previous DDoS record was from a 2,3 Tbps attack on Amazon's AWS division in February 2020.

Dahan said the previous major DDoS attack on Azure before the August attack was a 1 Tbps attack in the third quarter of 2020.

A few days after the Microsoft attack, a botnet called Meris broke another DDoS record - the record for the largest volumetric DDoS attack (volumetric DDoS attack).

According to Qrator Labs, Mernet botnet administrators launched a DDoS attack of 21,8 million requests per second (RPS) in early September. It targeted a Russian bank that hosted its e-banking portal on Yandex Cloud servers.

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