CISA Flags Fast Flux as a National Threat—Are You Covered? by Lucie Cardiet

This document explains the fast flux DNS technique used by attackers to evade detection by rapidly rotating IP addresses and, in double flux, name servers. It outlines why traditional IP blocking and DNS filtering fail, references CISA’s warnings and examples like Hive, Nefilim, and Gamaredon, and argues for behavior-based analytics to detect patterns such as anomalous DNS activity, beaconing, and lateral movement—showcasing how the Vectra AI Platform supports early detection and multi-layered defense.