CTE - Security Rule Changed CreatedUpdatedDeleted

CybereinforceCTE_CL
| where EventType in ("rule.created", "rule.updated", "rule.deleted")
| extend d = parse_json(Details)
| extend
    AccountName = tostring(split(Actor, "@")[0]),
    UPNSuffix = tostring(split(Actor, "@")[1]),
    AppName = "Cybereinforce",
    RuleId = tostring(d.ruleId),
    Pattern = tostring(d.pattern)
| summarize EventCount=count(), FirstSeen=min(TimeGenerated), LastSeen=max(TimeGenerated) by bin(TimeGenerated, 1d), EventType, RuleId, Actor, AccountName, UPNSuffix, AppName, Pattern, TenantId
| project TimeGenerated=LastSeen, TenantId, Actor, AccountName, UPNSuffix, AppName, EventType, RuleId, Pattern, EventCount, FirstSeen, LastSeen

name: CTE - Security Rule Changed (Created/Updated/Deleted)
triggerOperator: gt
query: |
  CybereinforceCTE_CL
  | where EventType in ("rule.created", "rule.updated", "rule.deleted")
  | extend d = parse_json(Details)
  | extend
      AccountName = tostring(split(Actor, "@")[0]),
      UPNSuffix = tostring(split(Actor, "@")[1]),
      AppName = "Cybereinforce",
      RuleId = tostring(d.ruleId),
      Pattern = tostring(d.pattern)
  | summarize EventCount=count(), FirstSeen=min(TimeGenerated), LastSeen=max(TimeGenerated) by bin(TimeGenerated, 1d), EventType, RuleId, Actor, AccountName, UPNSuffix, AppName, Pattern, TenantId
  | project TimeGenerated=LastSeen, TenantId, Actor, AccountName, UPNSuffix, AppName, EventType, RuleId, Pattern, EventCount, FirstSeen, LastSeen
queryFrequency: 30m
description: |
  A URL blocking/enforcement rule was created, updated, or deleted (potential policy tampering). Deduplicated per rule/day to avoid re-alerting on replayed audit events for the same change.
id: cf7ad1f5-7325-4bda-83d4-957ec943c457
triggerThreshold: 0
queryPeriod: 30m
version: 1.0.0
kind: Scheduled
relevantTechniques:
- T1562
severity: Medium
requiredDataConnectors:
- connectorId: cybereinforce_cte
  dataTypes:
  - CybereinforceCTE_CL
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cybereinforce/Analytic%20Rules/SecurityRuleChangedCreatedUpdatedDeleted.yaml
tactics:
- DefenseEvasion
entityMappings:
- fieldMappings:
  - identifier: Name
    columnName: AccountName
  - identifier: UPNSuffix
    columnName: UPNSuffix
  entityType: Account
- fieldMappings:
  - identifier: Name
    columnName: AppName
  entityType: CloudApplication

{
  "$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/cf7ad1f5-7325-4bda-83d4-957ec943c457')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/cf7ad1f5-7325-4bda-83d4-957ec943c457')]",
      "properties": {
        "alertRuleTemplateName": "cf7ad1f5-7325-4bda-83d4-957ec943c457",
        "customDetails": null,
        "description": "A URL blocking/enforcement rule was created, updated, or deleted (potential policy tampering). Deduplicated per rule/day to avoid re-alerting on replayed audit events for the same change.\n",
        "displayName": "CTE - Security Rule Changed (Created/Updated/Deleted)",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountName",
                "identifier": "Name"
              },
              {
                "columnName": "UPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "CloudApplication",
            "fieldMappings": [
              {
                "columnName": "AppName",
                "identifier": "Name"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cybereinforce/Analytic%20Rules/SecurityRuleChangedCreatedUpdatedDeleted.yaml",
        "query": "CybereinforceCTE_CL\n| where EventType in (\"rule.created\", \"rule.updated\", \"rule.deleted\")\n| extend d = parse_json(Details)\n| extend\n    AccountName = tostring(split(Actor, \"@\")[0]),\n    UPNSuffix = tostring(split(Actor, \"@\")[1]),\n    AppName = \"Cybereinforce\",\n    RuleId = tostring(d.ruleId),\n    Pattern = tostring(d.pattern)\n| summarize EventCount=count(), FirstSeen=min(TimeGenerated), LastSeen=max(TimeGenerated) by bin(TimeGenerated, 1d), EventType, RuleId, Actor, AccountName, UPNSuffix, AppName, Pattern, TenantId\n| project TimeGenerated=LastSeen, TenantId, Actor, AccountName, UPNSuffix, AppName, EventType, RuleId, Pattern, EventCount, FirstSeen, LastSeen\n",
        "queryFrequency": "PT30M",
        "queryPeriod": "PT30M",
        "severity": "Medium",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "DefenseEvasion"
        ],
        "techniques": [
          "T1562"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}