{
  "model_id": "SOC.089",
  "name": "System Time Changed",
  "description": "System clock adjusted — attackers change time to evade log correlation or trigger scheduled tasks early.",
  "threshold": 0.7,
  "evaluations": [
    {
      "name": "Date",
      "type": "comparison",
      "left": "event.raw.comm",
      "operator": "IN",
      "right": [
        "date",
        "timedatectl",
        "hwclock"
      ],
      "weight": 4
    },
    {
      "name": "Set",
      "type": "comparison",
      "left": "event.raw.cmdline",
      "operator": "LIKE",
      "right": "%--set%",
      "weight": 5
    },
    {
      "name": "Logic",
      "type": "logical",
      "operator": "AND",
      "operands": [
        "Date",
        "Set"
      ],
      "weight": 5
    }
  ],
  "actions": [
    {
      "type": "emit_alert",
      "reason": "System time modified — log correlation may be affected."
    }
  ],
  "mitre_tactics": [
    "Impact",
    "Defense Evasion"
  ],
  "mitre_techniques": [
    "T1499",
    "T1070"
  ],
  "severity": "high",
  "observables": [
    "event.actor.user"
  ]
}