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Cloudflare Thwarts Record 29.7 Tbps DDoS Blast Tied to AISURU Botnet

The IoT-powered botnet-for-hire lowers the barrier to nation-scale floods by harnessing up to 4 million compromised devices.

Overview

  • The 69-second attack used UDP carpet-bombing, blasting roughly 15,000 destination ports per second with randomized packet attributes, and the target was not disclosed.
  • Cloudflare attributes the assault to AISURU, which it estimates at 1–4 million infected routers and IoT devices operating as a rentable botnet.
  • Since January, Cloudflare has logged 2,867 AISURU attacks, including 1,304 hyper‑volumetric incidents in Q3 that were mitigated autonomously.
  • Short, high‑volume bursts increasingly overwhelm networks, with most DDoS events ending in under 10 minutes yet causing collateral ISP disruption and lengthy recovery.
  • Other recent peaks included a 14.1 billion‑pps flood, with attack sources clustering in Asian countries and targets spanning telecom, gaming, hosting, financial services, and AI firms.