On Monday 10 August 2026 at 10:33 UTC, a credential stuffing targeted a sports betting customer in Central Europe. The attack peaked at 115.3 million requests per second and lasted 104 minutes. Traffic originated from 1932 autonomous systems in 103 countries, predominantly a Mirai-derived IoT botnet.
| Vector | credential stuffing |
| Peak | 115.3 million requests per second |
| Duration | 104 min |
| Time to mitigation | 0.476 s |
| Attack traffic reaching origin | 0.042% |
| Legitimate traffic challenged | 0.40% |
Timeline
The attack was preceded by an extortion email received two days earlier. Request rates on the targeted routes exceeded their hourly baseline by a factor of 318 within 17 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
- Review allow-listed partner ranges quarterly.
- Keep origin IPs out of public DNS history.
- Enable authenticated origin pulls.