stealthy-c2

04 — Stealthy C2

Important

Authorized use only: Use these notes only in owned, explicitly authorized, or isolated lab environments.

Detection awareness: Assume commands, binaries, network calls, identity changes, and cloud or directory actions may be logged by endpoint tooling, audit frameworks, SIEM pipelines, proxy logs, DNS logs, auth logs, and platform telemetry.

Blue-team view: Treat every technique as a defender validation exercise too: note what artifacts it creates, what alerts or hunts could surface it, and what monitoring or hardening would prevent or contain it.

CTF/lab boundary: If a sandbox or CTF includes bypass-oriented exercises, keep them confined to that environment and translate the lesson into detection, prevention, and cleanup notes rather than real-world evasion guidance.

This file has been superseded. The summary table below has been fully built out with working implementations in the dedicated module.

Full coverage is in: 7.7 Advanced C2 Techniques

Each row in the original table is now a complete implementation section:

Technique Covered In
Google Calendar C2 (APT41/TOUGHPROGRESS) 7.7 Advanced C2 Techniques Section 5
Google Sheets / Docs 7.7 Advanced C2 Techniques Section 5
Slack/Discord Bots 7.7 Advanced C2 Techniques Section 4
GitHub Gist/Repo 7.7 Advanced C2 Techniques Section 3
DNS Tunneling 7.7 Advanced C2 Techniques Section 6
CDN Abuse / Domain Fronting 7.7 Advanced C2 Techniques Section 7
Email-based C2 (draft polling) 7.7 Advanced C2 Techniques Section 8
Steganography 7.7 Advanced C2 Techniques Section 9
OneDrive / SharePoint (Graph API) 7.7 Advanced C2 Techniques Section 2

Technique selection matrix (which channel to use in which scenario) is in 7.7 Advanced C2 Techniques Section 11.