On Sunday 29 June 2025 at 01:08 UTC, a Slowloris targeted a crypto exchange customer in Latin America. The attack peaked at 110.8 million requests per second and lasted 171 minutes. Traffic originated from 3790 autonomous systems in 77 countries, predominantly mobile carrier ranges.
| Vector | Slowloris |
| Peak | 110.8 million requests per second |
| Duration | 171 min |
| Time to mitigation | 0.045 s |
| Attack traffic reaching origin | 0.023% |
| Legitimate traffic challenged | 0.04% |
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 766 within 16 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
- Add a dedicated rate limit for the targeted route.
- Enable authenticated origin pulls.
- Keep origin IPs out of public DNS history.