Imperva - Possible command injection

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Id	6214f187-5840-4cf7-a174-0cf9a72bfd29
Rulename	Imperva - Possible command injection
Description	Detects requests with commands in URI.
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/ImpervaCommandInUri.yaml
Version	1.0.1
Arm template	6214f187-5840-4cf7-a174-0cf9a72bfd29.json

KQL

let cmd_lst = dynamic(['%2fetc%2fpasswd', '%2fetc%2fshadow', 'ping', 'whoami', 'phpinfo', '%2fbin%2fbash', 'curl', 'exec(', 'wget', 'python', 'gcc' , 'uname', 'systeminfo', 'rout', 'hostname', 'ifconfig']);
ImpervaWAFCloud
| where QueryString has_any (cmd_lst)
| extend IPCustomEntity = SrcIpAddr

YAML

relevantTechniques:
- T1190
- T1133
name: Imperva - Possible command injection
requiredDataConnectors:
- dataTypes:
  - ImpervaWAFCloud
  connectorId: ImpervaWAFCloudAPI
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
  entityType: IP
triggerThreshold: 0
id: 6214f187-5840-4cf7-a174-0cf9a72bfd29
tactics:
- InitialAccess
version: 1.0.1
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ImpervaCloudWAF/Analytic Rules/ImpervaCommandInUri.yaml
queryPeriod: 10m
kind: Scheduled
queryFrequency: 10m
severity: High
status: Available
description: |
    'Detects requests with commands in URI.'
query: |
  let cmd_lst = dynamic(['%2fetc%2fpasswd', '%2fetc%2fshadow', 'ping', 'whoami', 'phpinfo', '%2fbin%2fbash', 'curl', 'exec(', 'wget', 'python', 'gcc' , 'uname', 'systeminfo', 'rout', 'hostname', 'ifconfig']);
  ImpervaWAFCloud
  | where QueryString has_any (cmd_lst)
  | 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/6214f187-5840-4cf7-a174-0cf9a72bfd29')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/6214f187-5840-4cf7-a174-0cf9a72bfd29')]",
      "properties": {
        "alertRuleTemplateName": "6214f187-5840-4cf7-a174-0cf9a72bfd29",
        "customDetails": null,
        "description": "'Detects requests with commands in URI.'\n",
        "displayName": "Imperva - Possible command injection",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IPCustomEntity",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ImpervaCloudWAF/Analytic Rules/ImpervaCommandInUri.yaml",
        "query": "let cmd_lst = dynamic(['%2fetc%2fpasswd', '%2fetc%2fshadow', 'ping', 'whoami', 'phpinfo', '%2fbin%2fbash', 'curl', 'exec(', 'wget', 'python', 'gcc' , 'uname', 'systeminfo', 'rout', 'hostname', 'ifconfig']);\nImpervaWAFCloud\n| where QueryString has_any (cmd_lst)\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"
    }
  ]
}