On Wednesday 5 June 2024 at 13:33 UTC, a memcached amplification targeted a online payments customer in Central Europe. The attack peaked at 115.9 Gbps and lasted 132 minutes. Traffic originated from 1108 autonomous systems in 51 countries, predominantly hijacked home routers.
| Vector | memcached amplification |
| Peak | 115.9 Gbps |
| Duration | 132 min |
| Time to mitigation | 0.535 s |
| Attack traffic reaching origin | 0.037% |
| Legitimate traffic challenged | 0.32% |
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 38 points of presence.
What the customer saw
Checkout conversion was unchanged compared with the same hour of the previous week.
Recommendations
- Keep origin IPs out of public DNS history.
- Review allow-listed partner ranges quarterly.
- Enable log streaming to your SIEM for faster correlation.