On Thursday 11 July 2024 at 20:37 UTC, a UDP reflection (NTP) targeted a electronics retail customer in the Benelux. The attack peaked at 206.0 Gbps and lasted 140 minutes. Traffic originated from 254 autonomous systems in 62 countries, predominantly compromised cloud VMs.
| Vector | UDP reflection (NTP) |
| Peak | 206.0 Gbps |
| Duration | 140 min |
| Time to mitigation | 0.880 s |
| Attack traffic reaching origin | 0.014% |
| Legitimate traffic challenged | 0.08% |
Timeline
The attack was preceded by a hacktivist channel announcing the target. Edge packet filters identified the flood by source port and payload signature and dropped it at line rate across 15 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 authenticated origin pulls.
- Keep origin IPs out of public DNS history.
- Enable log streaming to your SIEM for faster correlation.