PolarEdge C2 Communication via Custom Binary Protocol with Custom TLS Server

In early 2025, security researchers unveiled a sophisticated botnet implant named PolarEdge, which relies on a bespoke TLS server and a proprietary binary protocol to carry out unauthenticated command-and-control operations. PolarEdge first emerged in January 2025 when honeypots monitoring Cisco routers captured suspicious traffic exploiting CVE-2023-20118. Attackers used a crafted HTTP request with the User-Agent […]

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