On Tuesday 5 September 2023 at 12:17 UTC, a memcached amplification targeted a online casino customer in Iberia. The attack peaked at 14.9 Gbps and lasted 91 minutes. Traffic originated from 2972 autonomous systems in 117 countries, predominantly mobile carrier ranges.
| Vector | memcached amplification |
| Peak | 14.9 Gbps |
| Duration | 91 min |
| Time to mitigation | 0.139 s |
| Attack traffic reaching origin | 0.083% |
| Legitimate traffic challenged | 0.34% |
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
The customer’s status page stayed green throughout; they learned about the attack from our notification.
Recommendations
- Enable log streaming to your SIEM for faster correlation.
- Add a dedicated rate limit for the targeted route.
- Enable authenticated origin pulls.
Any plans to support per-tenant limits keyed on a JWT claim?
Great write-up. We saw almost the same pattern on our login endpoint last month.
This matches what we see in iGaming around big matches.
Could you share the dataset behind the percentages?
Great write-up. We saw almost the same pattern on our login endpoint last month.
Our auditors asked for exactly this kind of incident evidence under DORA.