Best Detection of 2026 Series: DNS-Based C2 and Fast-Flux Infrastructure for Ran

Ibrahim Saud@tektrix

•updated Sep 27, 2026•2•1•2

Detects anomalous DNS activity characterized by high-frequency IP address rotation for a single domain within a 10-minute window. This behavior is indicative of fast-flux DNS techniques used by attackers to maintain C2 infrastructure and evade domain-based blocking or IP reputation filtering.