On Thursday 15 September 2022 at 04:30 UTC, a HTTP GET flood targeted a B2B SaaS customer in the Nordics. The attack peaked at 839.2 million requests per second and lasted 30 minutes. Traffic originated from 832 autonomous systems in 41 countries, predominantly a rented booter service.
| Vector | HTTP GET flood |
| Peak | 839.2 million requests per second |
| Duration | 30 min |
| Time to mitigation | 0.619 s |
| Attack traffic reaching origin | 0.047% |
| Legitimate traffic challenged | 0.12% |
Timeline
The attack was preceded by no stated motive. Request rates on the targeted routes exceeded their hourly baseline by a factor of 551 within 14 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 log streaming to your SIEM for faster correlation.
- Lower challenge thresholds on authentication endpoints during high-risk events.
- Enable authenticated origin pulls.
This matches what we see in iGaming around big matches.