Module 17 · Beyond Cobalt Strike — Sliver, Mythic, Brute Ratel, Havoc

Manish Garg
Manish Garg Associate of (ISC)² · RingSafe
May 14, 2026
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Why this module exists. Cobalt Strike remains the standard C2, but defender detection has caught up. Modern red teams operate with multiple C2 frameworks — Sliver, Mythic, Brute Ratel, custom-built. This module covers the C2 landscape and operational considerations for choosing and operating these tools.

The C2 landscape

Framework Licence Notes
Cobalt Strike Commercial (Fortra) Industry standard; highly detected
Sliver Open-source (Bishop Fox) Go-based; mTLS / DNS / WireGuard transport
Mythic Open-source Modular agent framework; multiple agents
Brute Ratel Commercial Newer; modern evasion features
Empire / Starkiller Open-source PowerShell-centric; widely detected
Havoc Open-source Modern; community-active
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