{"slug":"detecting-command-and-control-over-dns","source_name":"detecting-command-and-control-over-dns","name":"Detecting Command And Control Over DNS","description":"Detects command-and-control (C2) communications tunneled through DNS protocol including DNS tunneling tools (Iodine, dnscat2, dns2tcp, Cobalt Strike DNS beacon), domain generation algorithms (DGA), encoded payload delivery via TXT/CNAME records, and DNS beaconing patterns. Covers Shannon entropy analysis of query subdomains, statistical anomaly detection, ML-based DGA classification, passive DNS correlation, and Zeek/Suricata signature development. Activates for requests involving DNS-based C2 detection, DNS tunnel identification, suspicious DNS traffic investigation, or DGA domain classification.","version":1,"lift":{"pass_rate_delta_pts":36,"pass_rate_pct":40,"total_cases":25,"passed_cases":10,"tokens_delta_pct":509.4,"turns_delta_pct":0,"verdict":"mixed","benchmark_model":"gemini-3.6-flash","grading_method":"judged","completed_at":"2026-07-28T02:20:41.584855+00:00"},"skill_score":0.4,"benchmark_models":[{"model":"gemini-3.6-flash","headline":true,"delta_pts":36,"with_pass_pct":40,"without_pass_pct":4,"tokens_delta_pct":509.4,"turns_delta_pct":0,"total_cases":25,"cases_aggregated":22,"verdict":"mixed","never_hurt":false,"completed_at":"2026-07-28T02:20:41.584855+00:00","run_id":"e28aa09f-694d-4254-8193-80d6427a03b1","version_number":1,"is_latest_version":true,"gate":null}],"trust":{"skill_safety":"passed","safety_status":"clean","intent_verdict":null,"content_status":"clean","indexable":true},"license":"Apache-2.0","install_count":0,"manifest_hash":"5866ab8ebd2aa14a77984ca6ccdbbd086a151167e170b387b2d970b5e87df58c","raw_url":"https://app.decimal.ai/s/detecting-command-and-control-over-dns/SKILL.md","scorecard_url":"https://app.decimal.ai/skills/detecting-command-and-control-over-dns"}