windows_anomalous_script.json

{
  "job_type": "anomaly_detector",
  "description": "Security: Winlogbeat - Looks for unusual powershell scripts that may indicate execution of malware, or persistence mechanisms.",
  "groups": [
    "security",
    "winlogbeat",
    "powershell"
  ],
  "analysis_config": {
    "bucket_span": "15m",
    "detectors": [
      {
        "detector_description": "high_info_content(\"winlog.event_data.ScriptBlockText\")",
        "function": "high_info_content",
        "field_name": "winlog.event_data.ScriptBlockText"
      }
    ],
    "influencers": [
      "host.name",
      "user.name",
      "winlog.event_data.Path"
    ],
    "model_prune_window": "30d"
  },
  "allow_lazy_open": true,
  "analysis_limits": {
    "model_memory_limit": "256mb"
  },
  "data_description": {
    "time_field": "@timestamp"
  },
  "custom_settings": {
    "created_by": "ml-module-siem-winlogbeat",
    "custom_urls": [
      {
        "url_name": "Host Details by user name",
        "url_value": "security/hosts/ml-hosts/$host.name$?_g=()&query=(query:'user.name%20:%20%22$user.name$%22',language:kuery)&timerange=(global:(linkTo:!(timeline),timerange:(from:'$earliest$',kind:absolute,to:'$latest$')),timeline:(linkTo:!(global),timerange:(from:'$earliest$',kind:absolute,to:'$latest$')))"
      },
      {
        "url_name": "Hosts Overview by user name",
        "url_value": "security/hosts/ml-hosts?_g=()&query=(query:'user.name%20:%20%22$user.name$%22',language:kuery)&timerange=(global:(linkTo:!(timeline),timerange:(from:'$earliest$',kind:absolute,to:'$latest$')),timeline:(linkTo:!(global),timerange:(from:'$earliest$',kind:absolute,to:'$latest$')))"
      }
    ]
  }
}