On Wednesday 12 October 2022 at 16:04 UTC, a memcached amplification targeted a fashion retail customer in the UK. The attack peaked at 121.5 Gbps and lasted 34 minutes. Traffic originated from 3351 autonomous systems in 117 countries, predominantly hijacked home routers.
| Vector | memcached amplification |
| Peak | 121.5 Gbps |
| Duration | 34 min |
| Time to mitigation | 0.043 s |
| Attack traffic reaching origin | 0.061% |
| Legitimate traffic challenged | 0.58% |
Timeline
The attack was preceded by no stated motive. Edge packet filters identified the flood by source port and payload signature and dropped it at line rate across 17 points of presence.
What the customer saw
Checkout conversion was unchanged compared with the same hour of the previous week.
Recommendations
- Enable log streaming to your SIEM for faster correlation.
- Enable authenticated origin pulls.
- Review allow-listed partner ranges quarterly.