{
  "model_id": "SOC.064",
  "name": "tcpdump On Auth Traffic",
  "description": "tcpdump capturing traffic — specifically on auth-related ports (22, 636, 389).",
  "threshold": 0.7,
  "evaluations": [
    {
      "name": "Tcpdump",
      "type": "comparison",
      "left": "event.raw.comm",
      "operator": "==",
      "right": "tcpdump",
      "weight": 4
    },
    {
      "name": "AuthPort",
      "type": "comparison",
      "left": "event.raw.cmdline",
      "operator": "LIKE",
      "right": "%port 22%",
      "weight": 4
    },
    {
      "name": "Logic",
      "type": "logical",
      "operator": "AND",
      "operands": [
        "Tcpdump",
        "AuthPort"
      ],
      "weight": 5
    }
  ],
  "actions": [
    {
      "type": "emit_alert",
      "reason": "tcpdump capturing SSH traffic — credential sniffing."
    }
  ],
  "mitre_tactics": [
    "Credential Access",
    "Collection"
  ],
  "mitre_techniques": [
    "T1040"
  ],
  "severity": "high",
  "observables": [
    "event.actor.user"
  ]
}