Imperva - Malicious user agent

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Id	905794a9-bc46-42b9-974d-5a2dd58110c5
Rulename	Imperva - Malicious user agent
Description	Detects requests containing known malicious user agent strings.
Severity	High
Tactics	InitialAccess
Techniques	T1190 T1133
Required data connectors	ImpervaWAFCloudAPI
Kind	Scheduled
Query frequency	10m
Query period	10m
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ImpervaCloudWAF/Analytic Rules/ImpervaMaliciousUA.yaml
Version	1.0.1
Arm template	905794a9-bc46-42b9-974d-5a2dd58110c5.json

KQL

ImpervaWAFCloud
| where HttpUserAgentOriginal has_any ('Nikto', 'hydra', 'advanced email extractor', 'BFAC', 'brutus', 'cgichk', 'cisco-torch', 'scanner', 'datacha0s', 'dirbuster', 'grabber', 'havij', 'internet ninja', 'masscan', 'morfeus', 'mysqloit', 'n-stealth', 'nessus', 'netsparker', 'nmap nse', 'nmap scripting engine', 'nmap-nse', 'nsauditor', 'openvas', 'pangolin', 'qualys was', 'security scan', 'springenwerk', 'sql power injector', 'sqlmap', 'sqlninja', 'w3af.sf.net', 'w3af.sourceforge.net', 'w3af.org', 'webbandit', 'webinspect', 'webvulnscan', 'xmlrpc exploit', 'WPScan', 'XSpider', 'Webster', 'fantomCrew', 'fantomBrowser')
| summarize count() by SrcIpAddr, bin(TimeGenerated, 5m)
| extend IPCustomEntity = SrcIpAddr

YAML

relevantTechniques:
- T1190
- T1133
name: Imperva - Malicious user agent
requiredDataConnectors:
- dataTypes:
  - ImpervaWAFCloud
  connectorId: ImpervaWAFCloudAPI
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
  entityType: IP
triggerThreshold: 0
id: 905794a9-bc46-42b9-974d-5a2dd58110c5
tactics:
- InitialAccess
version: 1.0.1
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ImpervaCloudWAF/Analytic Rules/ImpervaMaliciousUA.yaml
queryPeriod: 10m
kind: Scheduled
queryFrequency: 10m
severity: High
status: Available
description: |
    'Detects requests containing known malicious user agent strings.'
query: |
  ImpervaWAFCloud
  | where HttpUserAgentOriginal has_any ('Nikto', 'hydra', 'advanced email extractor', 'BFAC', 'brutus', 'cgichk', 'cisco-torch', 'scanner', 'datacha0s', 'dirbuster', 'grabber', 'havij', 'internet ninja', 'masscan', 'morfeus', 'mysqloit', 'n-stealth', 'nessus', 'netsparker', 'nmap nse', 'nmap scripting engine', 'nmap-nse', 'nsauditor', 'openvas', 'pangolin', 'qualys was', 'security scan', 'springenwerk', 'sql power injector', 'sqlmap', 'sqlninja', 'w3af.sf.net', 'w3af.sourceforge.net', 'w3af.org', 'webbandit', 'webinspect', 'webvulnscan', 'xmlrpc exploit', 'WPScan', 'XSpider', 'Webster', 'fantomCrew', 'fantomBrowser')
  | summarize count() by SrcIpAddr, bin(TimeGenerated, 5m)
  | extend IPCustomEntity = SrcIpAddr  
triggerOperator: gt

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/905794a9-bc46-42b9-974d-5a2dd58110c5')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/905794a9-bc46-42b9-974d-5a2dd58110c5')]",
      "properties": {
        "alertRuleTemplateName": "905794a9-bc46-42b9-974d-5a2dd58110c5",
        "customDetails": null,
        "description": "'Detects requests containing known malicious user agent strings.'\n",
        "displayName": "Imperva - Malicious user agent",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IPCustomEntity",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ImpervaCloudWAF/Analytic Rules/ImpervaMaliciousUA.yaml",
        "query": "ImpervaWAFCloud\n| where HttpUserAgentOriginal has_any ('Nikto', 'hydra', 'advanced email extractor', 'BFAC', 'brutus', 'cgichk', 'cisco-torch', 'scanner', 'datacha0s', 'dirbuster', 'grabber', 'havij', 'internet ninja', 'masscan', 'morfeus', 'mysqloit', 'n-stealth', 'nessus', 'netsparker', 'nmap nse', 'nmap scripting engine', 'nmap-nse', 'nsauditor', 'openvas', 'pangolin', 'qualys was', 'security scan', 'springenwerk', 'sql power injector', 'sqlmap', 'sqlninja', 'w3af.sf.net', 'w3af.sourceforge.net', 'w3af.org', 'webbandit', 'webinspect', 'webvulnscan', 'xmlrpc exploit', 'WPScan', 'XSpider', 'Webster', 'fantomCrew', 'fantomBrowser')\n| summarize count() by SrcIpAddr, bin(TimeGenerated, 5m)\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"
    }
  ]
}