Application Gateway WAF - SQLi Detection

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Id	68c0b6bb-6bd9-4ef4-9011-08998c8ef90f
Rulename	Application Gateway WAF - SQLi Detection
Description	Identifies a match for SQL Injection attack in the Application gateway WAF logs. The Threshold value in the query can be changed as per your infrastructure’s requirement. References: https://owasp.org/Top10/A03_2021-Injection/
Severity	High
Tactics	DefenseEvasion Execution InitialAccess PrivilegeEscalation
Techniques	T1211 T1059 T1190 T0890
Required data connectors	WAF
Kind	Scheduled
Query frequency	6h
Query period	6h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Detections/AzureWAF/AppGwWAF-SQLiDetection.yaml
Version	1.0.1
Arm template	68c0b6bb-6bd9-4ef4-9011-08998c8ef90f.json

KQL

let Threshold = 3;
AzureDiagnostics
| where Category == "ApplicationGatewayFirewallLog"
| where action_s == "Matched"
| project transactionId_g, hostname_s, requestUri_s, TimeGenerated, clientIp_s, Message, details_message_s, details_data_s
| join kind = inner(
AzureDiagnostics
| where Category == "ApplicationGatewayFirewallLog"
| where action_s == "Blocked"
| parse Message with MessageText 'Total Inbound Score: ' TotalInboundScore ' - SQLI=' SQLI_Score ',XSS=' XSS_Score ',RFI=' RFI_Score ',LFI=' LFI_Score ',RCE=' RCE_Score ',PHPI=' PHPI_Score ',HTTP=' HTTP_Score ',SESS=' SESS_Score '): ' Blocked_Reason '; individual paranoia level scores:' Paranoia_Score
| where Blocked_Reason contains "SQL Injection Attack" and toint(SQLI_Score) >=10 and toint(TotalInboundScore) >= 15) on transactionId_g
| extend Uri = strcat(hostname_s,requestUri_s)
| summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated), TransactionID = make_set(transactionId_g), Message = make_set(Message), Detail_Message = make_set(details_message_s), Detail_Data = make_set(details_data_s), Total_TransactionId = dcount(transactionId_g) by clientIp_s, Uri, action_s, SQLI_Score, TotalInboundScore
| where Total_TransactionId >= Threshold

YAML

relevantTechniques:
- T1211
- T1059
- T1190
- T0890
name: Application Gateway WAF - SQLi Detection
requiredDataConnectors:
- dataTypes:
  - AzureDiagnostics
  connectorId: WAF
entityMappings:
- fieldMappings:
  - identifier: Url
    columnName: Uri
  entityType: URL
- fieldMappings:
  - identifier: Address
    columnName: clientIp_s
  entityType: IP
triggerThreshold: 0
id: 68c0b6bb-6bd9-4ef4-9011-08998c8ef90f
tactics:
- DefenseEvasion
- Execution
- InitialAccess
- PrivilegeEscalation
version: 1.0.1
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/AzureWAF/AppGwWAF-SQLiDetection.yaml
queryPeriod: 6h
kind: Scheduled
tags:
- SQL Injection
metadata:
  categories:
    domains:
    - Security - Threat Protection
    - Platform
  author:
    name: shabaz-github
  support:
    tier: Community
  source:
    kind: Community
queryFrequency: 6h
severity: High
description: |
  'Identifies a match for SQL Injection attack in the Application gateway WAF logs. The Threshold value in the query can be changed as per your infrastructure's requirement.
   References: https://owasp.org/Top10/A03_2021-Injection/'  
query: |
  let Threshold = 3;
  AzureDiagnostics
  | where Category == "ApplicationGatewayFirewallLog"
  | where action_s == "Matched"
  | project transactionId_g, hostname_s, requestUri_s, TimeGenerated, clientIp_s, Message, details_message_s, details_data_s
  | join kind = inner(
  AzureDiagnostics
  | where Category == "ApplicationGatewayFirewallLog"
  | where action_s == "Blocked"
  | parse Message with MessageText 'Total Inbound Score: ' TotalInboundScore ' - SQLI=' SQLI_Score ',XSS=' XSS_Score ',RFI=' RFI_Score ',LFI=' LFI_Score ',RCE=' RCE_Score ',PHPI=' PHPI_Score ',HTTP=' HTTP_Score ',SESS=' SESS_Score '): ' Blocked_Reason '; individual paranoia level scores:' Paranoia_Score
  | where Blocked_Reason contains "SQL Injection Attack" and toint(SQLI_Score) >=10 and toint(TotalInboundScore) >= 15) on transactionId_g
  | extend Uri = strcat(hostname_s,requestUri_s)
  | summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated), TransactionID = make_set(transactionId_g), Message = make_set(Message), Detail_Message = make_set(details_message_s), Detail_Data = make_set(details_data_s), Total_TransactionId = dcount(transactionId_g) by clientIp_s, Uri, action_s, SQLI_Score, TotalInboundScore
  | where Total_TransactionId >= Threshold  
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/68c0b6bb-6bd9-4ef4-9011-08998c8ef90f')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/68c0b6bb-6bd9-4ef4-9011-08998c8ef90f')]",
      "properties": {
        "alertRuleTemplateName": "68c0b6bb-6bd9-4ef4-9011-08998c8ef90f",
        "customDetails": null,
        "description": "'Identifies a match for SQL Injection attack in the Application gateway WAF logs. The Threshold value in the query can be changed as per your infrastructure's requirement.\n References: https://owasp.org/Top10/A03_2021-Injection/'\n",
        "displayName": "Application Gateway WAF - SQLi Detection",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "URL",
            "fieldMappings": [
              {
                "columnName": "Uri",
                "identifier": "Url"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "clientIp_s",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Detections/AzureWAF/AppGwWAF-SQLiDetection.yaml",
        "query": "let Threshold = 3;\nAzureDiagnostics\n| where Category == \"ApplicationGatewayFirewallLog\"\n| where action_s == \"Matched\"\n| project transactionId_g, hostname_s, requestUri_s, TimeGenerated, clientIp_s, Message, details_message_s, details_data_s\n| join kind = inner(\nAzureDiagnostics\n| where Category == \"ApplicationGatewayFirewallLog\"\n| where action_s == \"Blocked\"\n| parse Message with MessageText 'Total Inbound Score: ' TotalInboundScore ' - SQLI=' SQLI_Score ',XSS=' XSS_Score ',RFI=' RFI_Score ',LFI=' LFI_Score ',RCE=' RCE_Score ',PHPI=' PHPI_Score ',HTTP=' HTTP_Score ',SESS=' SESS_Score '): ' Blocked_Reason '; individual paranoia level scores:' Paranoia_Score\n| where Blocked_Reason contains \"SQL Injection Attack\" and toint(SQLI_Score) >=10 and toint(TotalInboundScore) >= 15) on transactionId_g\n| extend Uri = strcat(hostname_s,requestUri_s)\n| summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated), TransactionID = make_set(transactionId_g), Message = make_set(Message), Detail_Message = make_set(details_message_s), Detail_Data = make_set(details_data_s), Total_TransactionId = dcount(transactionId_g) by clientIp_s, Uri, action_s, SQLI_Score, TotalInboundScore\n| where Total_TransactionId >= Threshold\n",
        "queryFrequency": "PT6H",
        "queryPeriod": "PT6H",
        "severity": "High",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "DefenseEvasion",
          "Execution",
          "InitialAccess",
          "PrivilegeEscalation"
        ],
        "tags": [
          "SQL Injection"
        ],
        "techniques": [
          "T1059",
          "T1190",
          "T1211"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}