Microsoft Sentinel Analytic Rules
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Imperva - Critical severity event not blocked

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Id4d365217-f96a-437c-9c57-53594fa261c3
RulenameImperva - Critical severity event not blocked
DescriptionDetects when critical severity event was not blocked.
SeverityHigh
TacticsInitialAccess
TechniquesT1190
T1133
Required data connectorsImpervaWAFCloudAPI
KindScheduled
Query frequency10m
Query period10m
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ImpervaCloudWAF/Analytic Rules/ImpervaAttackNotBlocked.yaml
Version1.0.1
Arm template4d365217-f96a-437c-9c57-53594fa261c3.json
Deploy To Azure
ImpervaWAFCloud
| where EventSeverity =~ 'CRITICAL'
| where DvcAction !startswith 'REQ_BLOCKED' or DvcAction !startswith 'REQ_BAD_'
| extend IPCustomEntity = SrcIpAddr
status: Available
id: 4d365217-f96a-437c-9c57-53594fa261c3
query: |
  ImpervaWAFCloud
  | where EventSeverity =~ 'CRITICAL'
  | where DvcAction !startswith 'REQ_BLOCKED' or DvcAction !startswith 'REQ_BAD_'
  | extend IPCustomEntity = SrcIpAddr  
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ImpervaCloudWAF/Analytic Rules/ImpervaAttackNotBlocked.yaml
description: |
    'Detects when critical severity event was not blocked.'
name: Imperva - Critical severity event not blocked
relevantTechniques:
- T1190
- T1133
entityMappings:
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
triggerThreshold: 0
severity: High
requiredDataConnectors:
- dataTypes:
  - ImpervaWAFCloud
  connectorId: ImpervaWAFCloudAPI
queryFrequency: 10m
queryPeriod: 10m
version: 1.0.1
kind: Scheduled
tactics:
- InitialAccess
triggerOperator: gt
{
  "$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/4d365217-f96a-437c-9c57-53594fa261c3')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/4d365217-f96a-437c-9c57-53594fa261c3')]",
      "properties": {
        "alertRuleTemplateName": "4d365217-f96a-437c-9c57-53594fa261c3",
        "customDetails": null,
        "description": "'Detects when critical severity event was not blocked.'\n",
        "displayName": "Imperva - Critical severity event not blocked",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IPCustomEntity",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ImpervaCloudWAF/Analytic Rules/ImpervaAttackNotBlocked.yaml",
        "query": "ImpervaWAFCloud\n| where EventSeverity =~ 'CRITICAL'\n| where DvcAction !startswith 'REQ_BLOCKED' or DvcAction !startswith 'REQ_BAD_'\n| extend IPCustomEntity = SrcIpAddr\n",
        "queryFrequency": "PT10M",
        "queryPeriod": "PT10M",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess"
        ],
        "techniques": [
          "T1133",
          "T1190"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}