Cloudflare mitigates record-breaking HTTPS DDoS attack

Gandalf_The_Grey

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Internet infrastructure firm Cloudflare said today that it mitigated a 26 million request per second distributed denial-of-service (DDoS) attack, the largest HTTPS DDoS attack detected to date.

The record-breaking attack occurred last week and targeted one of Cloudflare's customers using the Free plan.

The threat actor behind it likely used hijacked servers and virtual machines seeing that the attack originated from Cloud Service Providers instead of weaker Internet of Things (IoT) devices from compromised Residential Internet Service Providers.

According to Cloudflare, the attacker also used a rather small yet very powerful botnet of 5,067 devices, each capable of generating roughly 5,200 rps when peaking.

"To contrast the size of this botnet, we've been tracking another much larger but less powerful botnet of over 730,000 devices," revealed Cloudflare Product Manager Omer Yoachimik.

"The latter, larger botnet wasn't able to generate more than one million requests per second, i.e., roughly 1.3 requests per second on average per device. Putting it plainly, this botnet was, on average, 4,000 times stronger due to its use of virtual machines and servers.