On Tuesday 30 December 2025 at 01:37 UTC, a GRE flood targeted a retail banking customer in the Benelux. The attack peaked at 28.8 Gbps and lasted 60 minutes. Traffic originated from 979 autonomous systems in 93 countries, predominantly a Mirai-derived IoT botnet.
| Vector | GRE flood |
| Peak | 28.8 Gbps |
| Duration | 60 min |
| Time to mitigation | 0.475 s |
| Attack traffic reaching origin | 0.086% |
| Legitimate traffic challenged | 0.06% |
Timeline
The attack was preceded by a breaking political story. Edge packet filters identified the flood by source port and payload signature and dropped it at line rate across 31 points of presence.
What the customer saw
A brief increase in p99 latency of 198 ms during the first minute, then normal service.
Recommendations
- Add a dedicated rate limit for the targeted route.
- Lower challenge thresholds on authentication endpoints during high-risk events.
- Enable log streaming to your SIEM for faster correlation.