Threat Bulletin 1035: HTTP POST flood against a gaming community platform in Iberia

On Friday 14 February 2025 at 16:33 UTC, a HTTP POST flood targeted a gaming community customer in Iberia. The attack peaked at 572.0 million requests per second and lasted 108 minutes. Traffic originated from 2563 autonomous systems in 62 countries, predominantly compromised cloud VMs.

Vector HTTP POST flood
Peak 572.0 million requests per second
Duration 108 min
Time to mitigation 0.508 s
Attack traffic reaching origin 0.072%
Legitimate traffic challenged 0.01%

Timeline

The attack was preceded by a breaking political story. Request rates on the targeted routes exceeded their hourly baseline by a factor of 262 within 10 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

  • Enable log streaming to your SIEM for faster correlation.
  • Add a dedicated rate limit for the targeted route.
  • Review allow-listed partner ranges quarterly.

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