On Thursday 7 August 2025 at 10:00 UTC, a UDP reflection (NTP) targeted a B2B SaaS customer in North America. The attack peaked at 167.0 Gbps and lasted 163 minutes. Traffic originated from 471 autonomous systems in 94 countries, predominantly a Mirai-derived IoT botnet.
| Vector | UDP reflection (NTP) |
| Peak | 167.0 Gbps |
| Duration | 163 min |
| Time to mitigation | 0.287 s |
| Attack traffic reaching origin | 0.033% |
| Legitimate traffic challenged | 0.16% |
Timeline
The attack was preceded by a competitor’s product launch. Edge packet filters identified the flood by source port and payload signature and dropped it at line rate across 22 points of presence.
What the customer saw
The customer’s status page stayed green throughout; they learned about the attack from our notification.
Recommendations
- Keep origin IPs out of public DNS history.
- Review allow-listed partner ranges quarterly.
- Enable log streaming to your SIEM for faster correlation.