Claroty - Policy violation | Microsoft Sentinel Analytic Rules

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Id	3b22ac47-e02c-4599-a37a-57f965de17be
Rulename	Claroty - Policy violation
Description	Detects Claroty policy violation events from ClarotyEvent when EventOriginalType or EventType contains ‘Policy Violation’. Use this rule to identify policy enforcement events that may indicate unauthorized discovery or prohibited network activity. This rule expects ClarotyEvent data to be available in the workspace.
Severity	High
Tactics	Discovery
Techniques	T1018 T1135
Required data connectors	CefAma
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Claroty/Analytic%20Rules/ClarotyPolicyViolation.yaml
Version	1.0.4
Arm template	3b22ac47-e02c-4599-a37a-57f965de17be.json

KQL

ClarotyEvent
  | where EventOriginalType has 'Policy Violation' or EventType has 'Policy Violation'
  | project TimeGenerated, DstIpAddr, EventOriginalType, EventType
  | extend IPCustomEntity = DstIpAddr

YAML

triggerThreshold: 0
version: 1.0.4
kind: Scheduled
description: |
  'Detects Claroty policy violation events from ClarotyEvent when EventOriginalType or EventType contains 'Policy
  Violation'. Use this rule to identify policy enforcement events that may indicate unauthorized discovery or prohibited network
  activity. This rule expects ClarotyEvent data to be available in the workspace.'
queryFrequency: 1h
triggerOperator: gt
relevantTechniques:
- T1018
- T1135
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
  entityType: IP
id: 3b22ac47-e02c-4599-a37a-57f965de17be
query: |
  ClarotyEvent
    | where EventOriginalType has 'Policy Violation' or EventType has 'Policy Violation'
    | project TimeGenerated, DstIpAddr, EventOriginalType, EventType
    | extend IPCustomEntity = DstIpAddr
alertDetailsOverride:
  alertDisplayNameFormat: Claroty policy violation detected for {{IPCustomEntity}}
  alertDescriptionFormat: 'Claroty reported a policy violation for {{IPCustomEntity}}. EventOriginalType: {{EventOriginalType}}. EventType: {{EventType}}'
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Claroty/Analytic%20Rules/ClarotyPolicyViolation.yaml
requiredDataConnectors:
- dataTypes:
  - CommonSecurityLog
  connectorId: CefAma
customDetails:
  EventType: EventType
  DestinationIP: DstIpAddr
  EventOriginalType: EventOriginalType
tactics:
- Discovery
queryPeriod: 1h
severity: High
status: Available
name: Claroty - Policy violation

ARM

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2024-01-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/3b22ac47-e02c-4599-a37a-57f965de17be')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/3b22ac47-e02c-4599-a37a-57f965de17be')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "Claroty reported a policy violation for {{IPCustomEntity}}. EventOriginalType: {{EventOriginalType}}. EventType: {{EventType}}",
          "alertDisplayNameFormat": "Claroty policy violation detected for {{IPCustomEntity}}"
        },
        "alertRuleTemplateName": "3b22ac47-e02c-4599-a37a-57f965de17be",
        "customDetails": {
          "DestinationIP": "DstIpAddr",
          "EventOriginalType": "EventOriginalType",
          "EventType": "EventType"
        },
        "description": "'Detects Claroty policy violation events from ClarotyEvent when EventOriginalType or EventType contains 'Policy\nViolation'. Use this rule to identify policy enforcement events that may indicate unauthorized discovery or prohibited network\nactivity. This rule expects ClarotyEvent data to be available in the workspace.'\n",
        "displayName": "Claroty - Policy violation",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IPCustomEntity",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Claroty/Analytic%20Rules/ClarotyPolicyViolation.yaml",
        "query": "ClarotyEvent\n  | where EventOriginalType has 'Policy Violation' or EventType has 'Policy Violation'\n  | project TimeGenerated, DstIpAddr, EventOriginalType, EventType\n  | extend IPCustomEntity = DstIpAddr\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Discovery"
        ],
        "techniques": [
          "T1018",
          "T1135"
        ],
        "templateVersion": "1.0.4",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}