Imperva - Malicious Client

ImpervaWAFCloud
| where ClientApp in~ ('VulnerabilityScanner', 'DDoSBot', 'ClickBot','CommentSpamBot','HackingTool', 'SpamBot', 'Worm')
| where DvcAction !startswith 'REQ_BLOCKED' or DvcAction !startswith 'REQ_BAD_'
| extend IPCustomEntity = SrcIpAddr, UrlCustomEntity = QueryString

kind: Scheduled
relevantTechniques:
- T1190
- T1133
description: |
    'Detects connections from known malicious clients.'
queryPeriod: 10m
queryFrequency: 10m
tactics:
- InitialAccess
name: Imperva - Malicious Client
requiredDataConnectors:
- connectorId: ImpervaWAFCloudAPI
  dataTypes:
  - ImpervaWAFCloud
entityMappings:
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
- entityType: URL
  fieldMappings:
  - identifier: Url
    columnName: UrlCustomEntity
triggerThreshold: 0
version: 1.0.1
id: 2ff35ed4-b26a-4cad-93a6-f67adb00e919
query: |
  ImpervaWAFCloud
  | where ClientApp in~ ('VulnerabilityScanner', 'DDoSBot', 'ClickBot','CommentSpamBot','HackingTool', 'SpamBot', 'Worm')
  | where DvcAction !startswith 'REQ_BLOCKED' or DvcAction !startswith 'REQ_BAD_'
  | extend IPCustomEntity = SrcIpAddr, UrlCustomEntity = QueryString  
status: Available
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ImpervaCloudWAF/Analytic Rules/ImpervaMaliciousClient.yaml
severity: High

{
  "$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/2ff35ed4-b26a-4cad-93a6-f67adb00e919')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/2ff35ed4-b26a-4cad-93a6-f67adb00e919')]",
      "properties": {
        "alertRuleTemplateName": "2ff35ed4-b26a-4cad-93a6-f67adb00e919",
        "customDetails": null,
        "description": "'Detects connections from known malicious clients.'\n",
        "displayName": "Imperva - Malicious Client",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IPCustomEntity",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "URL",
            "fieldMappings": [
              {
                "columnName": "UrlCustomEntity",
                "identifier": "Url"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ImpervaCloudWAF/Analytic Rules/ImpervaMaliciousClient.yaml",
        "query": "ImpervaWAFCloud\n| where ClientApp in~ ('VulnerabilityScanner', 'DDoSBot', 'ClickBot','CommentSpamBot','HackingTool', 'SpamBot', 'Worm')\n| where DvcAction !startswith 'REQ_BLOCKED' or DvcAction !startswith 'REQ_BAD_'\n| extend IPCustomEntity = SrcIpAddr, UrlCustomEntity = QueryString\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"
    }
  ]
}