Threat Bulletin 1397: credential stuffing against a electronics retail platform in the Middle East

On Thursday 2 July 2026 at 04:30 UTC, a credential stuffing targeted a electronics retail customer in the Middle East. The attack peaked at 192.3 million requests per second and lasted 136 minutes. Traffic originated from 2151 autonomous systems in 53 countries, predominantly hijacked home routers.

Vector credential stuffing
Peak 192.3 million requests per second
Duration 136 min
Time to mitigation 0.169 s
Attack traffic reaching origin 0.088%
Legitimate traffic challenged 0.73%

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 560 within 38 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

A brief increase in p99 latency of 49 ms during the first minute, then normal service.

Recommendations

  • Keep origin IPs out of public DNS history.
  • Add a dedicated rate limit for the targeted route.
  • Lower challenge thresholds on authentication endpoints during high-risk events.

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