Another record breaking Aisuru botnet attack averted

BleepingComputer reports that Cloudflare has foiled an Aisuru botnet-facilitated Layer 4 distributed denial-of-service attack campaign in December that peaked at 31.4 terabits per second, surpassing the previous Aisuru record of 29.7 Tbps.

Telecommunications firms were mostly targeted by "The Night Before Christmas" campaign, which also included hyper-volumetric HTTP DDoS attacks above 200 million requests per second, according to Cloudflare. Ninety percent of Aisuru's attacks maxed out between 1 Tbps and 5 Tbps, while over 50% were one to two minutes long.

Meanwhile, total DDoS intrusions reached 47.1 million last year, which is a 121% year-over-year increase, with attacks in the fourth quarter rising 58% from the same period in 2024. Telecommunications providers, IT and services companies, gambling entities, and gaming firms were the leading targets of DDoS incidents in the fourth quarter, while China, Hong Kong, Germany, Brazil, and the U.S. were subjected to the most attacks during the same period.