DNS Over HTTPS for Cobalt Strike

This post explains how to run Cobalt Strike Beacon over DNS over HTTPS (DoH) using the TitanLdr user-defined reflective loader to hook DNSQuery_A and route queries through reputable DoH providers (e.g., Google, Quad9, Cloudflare, OpenDNS, HE), including a fork that randomizes among multiple resolvers, build instructions, and Cobalt Strike setup. It highlights advantages (valid SSL, no third-party infrastructure, trusted domains), tradeoffs (lower throughput due to TXT record limits, reliance on public DoH endpoints), and detection/mitigation ideas such as combining DNS monitoring with SSL inspection and blocking outbound 443/TCP to unneeded DoH servers.