On Sunday 1 February 2026 at 07:36 UTC, a Slowloris targeted a tax authority portal customer in the Nordics. The attack peaked at 118.6 million requests per second and lasted 132 minutes. Traffic originated from 494 autonomous systems in 107 countries, predominantly a rented booter service.
| Vector | Slowloris |
| Peak | 118.6 million requests per second |
| Duration | 132 min |
| Time to mitigation | 0.516 s |
| Attack traffic reaching origin | 0.021% |
| Legitimate traffic challenged | 0.71% |
Timeline
The attack was preceded by no stated motive. Request rates on the targeted routes exceeded their hourly baseline by a factor of 257 within 36 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
The customer’s status page stayed green throughout; they learned about the attack from our notification.
Recommendations
- Add a dedicated rate limit for the targeted route.
- Review allow-listed partner ranges quarterly.
- Keep origin IPs out of public DNS history.