{
  "model_id": "SOC.078",
  "name": "HTTPS On Non-Standard Port",
  "description": "TLS traffic on a port other than 443 — possible C2 channel trying to blend with web traffic.",
  "threshold": 0.6,
  "evaluations": [
    {
      "name": "Conn",
      "type": "comparison",
      "left": "event.type",
      "operator": "==",
      "right": "network.connection.established",
      "weight": 2
    },
    {
      "name": "Not443",
      "type": "comparison",
      "left": "event.raw.remote_port",
      "operator": "!=",
      "right": 443,
      "weight": 3
    },
    {
      "name": "TLSPort",
      "type": "comparison",
      "left": "event.raw.remote_port",
      "operator": "IN",
      "right": [
        "8443",
        "4443",
        "8080",
        "8888"
      ],
      "weight": 4
    },
    {
      "name": "Logic",
      "type": "logical",
      "operator": "AND",
      "operands": [
        "Conn",
        "Not443",
        "TLSPort"
      ],
      "weight": 4
    }
  ],
  "actions": [
    {
      "type": "emit_alert",
      "reason": "TLS on non-standard port {event.raw.remote_port} — possible C2."
    }
  ],
  "mitre_tactics": [
    "Command and Control"
  ],
  "mitre_techniques": [
    "T1571",
    "T1071.001"
  ],
  "severity": "medium",
  "observables": [
    "event.raw.remote_ip",
    "event.raw.remote_port"
  ]
}