On Saturday 23 April 2022 at 07:18 UTC, a credential stuffing targeted a video streaming customer in the Benelux. The attack peaked at 694.2 million requests per second and lasted 157 minutes. Traffic originated from 2427 autonomous systems in 44 countries, predominantly mobile carrier ranges.
| Vector | credential stuffing |
| Peak | 694.2 million requests per second |
| Duration | 157 min |
| Time to mitigation | 0.558 s |
| Attack traffic reaching origin | 0.052% |
| Legitimate traffic challenged | 0.11% |
Timeline
The attack was preceded by a competitor’s product launch. Request rates on the targeted routes exceeded their hourly baseline by a factor of 128 within 5 seconds. The risk score of participating clients crossed the challenge threshold automatically and proof-of-work difficulty rose with origin load.
What the customer saw
No customer-visible impact. The on-call engineer was notified and acknowledged the incident from the dashboard.
Recommendations
- Review allow-listed partner ranges quarterly.
- Enable authenticated origin pulls.
- Keep origin IPs out of public DNS history.
Interesting that most attacks are under ten minutes. Our experience is similar.
Do you publish the edge IP ranges in a machine-readable format?
Interesting that most attacks are under ten minutes. Our experience is similar.