On Wednesday 22 January 2025 at 05:49 UTC, a memcached amplification targeted a retail banking customer in the Benelux. The attack peaked at 353.7 Gbps and lasted 153 minutes. Traffic originated from 1228 autonomous systems in 34 countries, predominantly hijacked home routers.
| Vector | memcached amplification |
| Peak | 353.7 Gbps |
| Duration | 153 min |
| Time to mitigation | 0.309 s |
| Attack traffic reaching origin | 0.018% |
| Legitimate traffic challenged | 0.27% |
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 14 points of presence.
What the customer saw
A brief increase in p99 latency of 171 ms during the first minute, then normal service.
Recommendations
- Keep origin IPs out of public DNS history.
- Review allow-listed partner ranges quarterly.
- Enable authenticated origin pulls.
Could you share the dataset behind the percentages?
Would love a follow-up on how you handle HTTP/3 fingerprinting.
Clear and practical, thanks.
Clear and practical, thanks.
Would love a follow-up on how you handle HTTP/3 fingerprinting.
Great to hear, thanks for sharing your experience.