Sentinel One - Same custom rule triggered on different hosts

SentinelOne
| where ActivityType == 3608
| extend RuleName = extract(@'Custom Rule:\s(.*?)\sin Group', 1, EventOriginalMessage)
| extend DstHostname = extract(@'detected on\s(\S+)\.', 1, EventOriginalMessage)
| summarize hosts = makeset(DstHostname) by RuleName, bin(TimeGenerated, 15m)
| where array_length(hosts) > 1
| extend HostCustomEntity = hosts

triggerOperator: gt
id: 5586d378-1bce-4d9b-9ac8-e7271c9d5a9a
queryFrequency: 1h
entityMappings:
- entityType: Host
  fieldMappings:
  - columnName: HostCustomEntity
    identifier: HostName
requiredDataConnectors:
- dataTypes:
  - SentinelOne
  connectorId: SentinelOne
severity: High
triggerThreshold: 0
kind: Scheduled
status: Available
queryPeriod: 1h
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/SentinelOne/Analytic Rules/SentinelOneSameCustomRuleHitOnDiffHosts.yaml
query: |
  SentinelOne
  | where ActivityType == 3608
  | extend RuleName = extract(@'Custom Rule:\s(.*?)\sin Group', 1, EventOriginalMessage)
  | extend DstHostname = extract(@'detected on\s(\S+)\.', 1, EventOriginalMessage)
  | summarize hosts = makeset(DstHostname) by RuleName, bin(TimeGenerated, 15m)
  | where array_length(hosts) > 1
  | extend HostCustomEntity = hosts  
description: |
    'Detects when same custom rule was triggered on different hosts.'
name: Sentinel One - Same custom rule triggered on different hosts
tactics:
- InitialAccess
version: 1.0.1

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/5586d378-1bce-4d9b-9ac8-e7271c9d5a9a')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/5586d378-1bce-4d9b-9ac8-e7271c9d5a9a')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01",
      "properties": {
        "displayName": "Sentinel One - Same custom rule triggered on different hosts",
        "description": "'Detects when same custom rule was triggered on different hosts.'\n",
        "severity": "High",
        "enabled": true,
        "query": "SentinelOne\n| where ActivityType == 3608\n| extend RuleName = extract(@'Custom Rule:\\s(.*?)\\sin Group', 1, EventOriginalMessage)\n| extend DstHostname = extract(@'detected on\\s(\\S+)\\.', 1, EventOriginalMessage)\n| summarize hosts = makeset(DstHostname) by RuleName, bin(TimeGenerated, 15m)\n| where array_length(hosts) > 1\n| extend HostCustomEntity = hosts\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess"
        ],
        "alertRuleTemplateName": "5586d378-1bce-4d9b-9ac8-e7271c9d5a9a",
        "customDetails": null,
        "entityMappings": [
          {
            "fieldMappings": [
              {
                "identifier": "HostName",
                "columnName": "HostCustomEntity"
              }
            ],
            "entityType": "Host"
          }
        ],
        "templateVersion": "1.0.1",
        "status": "Available",
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/SentinelOne/Analytic Rules/SentinelOneSameCustomRuleHitOnDiffHosts.yaml"
      }
    }
  ]
}