Cloudflare has mitigated the biggest distributed denial of service (DDoS) attack on record. Here's what you need to know.

Cloudflare blocked a 5.6 Tbps DDoS attack from a Mirai botnet, with 1+ Tbps attacks surging 1,885% in Q4 2024.

Last week, security company Trend Micro said it also found an IoT botnet. The botnet, which is driven by variants of Mirai and a similar malware family known as Bashlite, has been delivering large-scale DDoSes since the end of last year, primarily to targets in Japan.

Cloudflare says the attack against an East Asian ISP came from 13,000 devices infected with a variant of the notorious Mirai malware.