On Sunday 30 April 2023 at 13:45 UTC, a credential stuffing targeted a online payments customer in Southeast Asia. The attack peaked at 415.0 million requests per second and lasted 19 minutes. Traffic originated from 3912 autonomous systems in 97 countries, predominantly residential proxy networks.
| Vector | credential stuffing |
| Peak | 415.0 million requests per second |
| Duration | 19 min |
| Time to mitigation | 0.746 s |
| Attack traffic reaching origin | 0.075% |
| Legitimate traffic challenged | 0.18% |
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 778 within 11 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
Checkout conversion was unchanged compared with the same hour of the previous week.
Recommendations
- Enable authenticated origin pulls.
- Enable log streaming to your SIEM for faster correlation.
- Lower challenge thresholds on authentication endpoints during high-risk events.