On Sunday 25 May 2025 at 13:53 UTC, a GRE flood targeted a electronics retail customer in Southeast Asia. The attack peaked at 6.8 Gbps and lasted 148 minutes. Traffic originated from 2704 autonomous systems in 66 countries, predominantly hijacked home routers.
| Vector | GRE flood |
| Peak | 6.8 Gbps |
| Duration | 148 min |
| Time to mitigation | 0.658 s |
| Attack traffic reaching origin | 0.052% |
| Legitimate traffic challenged | 0.43% |
Timeline
The attack was preceded by a ransom note demanding payment in Monero. Edge packet filters identified the flood by source port and payload signature and dropped it at line rate across 29 points of presence.
What the customer saw
A brief increase in p99 latency of 70 ms during the first minute, then normal service.
Recommendations
- Enable log streaming to your SIEM for faster correlation.
- Enable authenticated origin pulls.
- Review allow-listed partner ranges quarterly.
The billing model is what got our finance team on board, honestly.
The billing model is what got our finance team on board, honestly.
Interesting that most attacks are under ten minutes. Our experience is similar.