App Gateway WAF - Scanner Detection
Id | 9b8dd8fd-f192-42eb-84f6-541920400a7a |
Rulename | App Gateway WAF - Scanner Detection |
Description | Identifies a match for a Scanner detection user agent based attack in the App Gateway WAF logs. The threshold value in the query can be changed as per your infrastructure’s requirements. References: https://owasp.org/www-community/Vulnerability_Scanning_Tools |
Severity | High |
Tactics | DefenseEvasion Execution InitialAccess Reconnaissance Discovery |
Techniques | T1548 T1203 T1190 T1595 T1046 |
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/Solutions/Azure Web Application Firewall (WAF)/Analytic Rules/App-GW-WAF-Scanner-detection.yaml |
Version | 1.0.2 |
Arm template | 9b8dd8fd-f192-42eb-84f6-541920400a7a.json |
let Threshold = 3;
AzureDiagnostics
| where ResourceProvider == 'MICROSOFT.NETWORK' and Category == 'ApplicationGatewayFirewallLog'
| where action_s == "Matched"
| where Message contains "Found User-Agent associated with security scanner"
| project transactionId_g, hostname_s, requestUri_s, TimeGenerated, clientIp_s, Message, details_message_s, details_data_s
| join kind = inner(
AzureDiagnostics
| where ResourceProvider == 'MICROSOFT.NETWORK' and Category == 'ApplicationGatewayFirewallLog'
| where action_s == "Blocked"
) 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
| where Total_TransactionId >= Threshold
id: 9b8dd8fd-f192-42eb-84f6-541920400a7a
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Web Application Firewall (WAF)/Analytic Rules/App-GW-WAF-Scanner-detection.yaml
requiredDataConnectors:
- dataTypes:
- AzureDiagnostics
connectorId: WAF
description: |
'Identifies a match for a Scanner detection user agent based attack in the App Gateway WAF logs. The threshold value in the query can be changed as per your infrastructure's requirements.
References: https://owasp.org/www-community/Vulnerability_Scanning_Tools'
severity: High
queryPeriod: 6h
kind: Scheduled
tags:
- Scanner Detection
tactics:
- DefenseEvasion
- Execution
- InitialAccess
- Reconnaissance
- Discovery
queryFrequency: 6h
query: |
let Threshold = 3;
AzureDiagnostics
| where ResourceProvider == 'MICROSOFT.NETWORK' and Category == 'ApplicationGatewayFirewallLog'
| where action_s == "Matched"
| where Message contains "Found User-Agent associated with security scanner"
| project transactionId_g, hostname_s, requestUri_s, TimeGenerated, clientIp_s, Message, details_message_s, details_data_s
| join kind = inner(
AzureDiagnostics
| where ResourceProvider == 'MICROSOFT.NETWORK' and Category == 'ApplicationGatewayFirewallLog'
| where action_s == "Blocked"
) 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
| where Total_TransactionId >= Threshold
version: 1.0.2
triggerThreshold: 0
name: App Gateway WAF - Scanner Detection
entityMappings:
- entityType: URL
fieldMappings:
- columnName: Uri
identifier: Url
- entityType: IP
fieldMappings:
- columnName: clientIp_s
identifier: Address
status: Available
relevantTechniques:
- T1548
- T1203
- T1190
- T1595
- T1046
{
"$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/9b8dd8fd-f192-42eb-84f6-541920400a7a')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/9b8dd8fd-f192-42eb-84f6-541920400a7a')]",
"properties": {
"alertRuleTemplateName": "9b8dd8fd-f192-42eb-84f6-541920400a7a",
"customDetails": null,
"description": "'Identifies a match for a Scanner detection user agent based attack in the App Gateway WAF logs. The threshold value in the query can be changed as per your infrastructure's requirements.\nReferences: https://owasp.org/www-community/Vulnerability_Scanning_Tools'\n",
"displayName": "App Gateway WAF - Scanner 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/Solutions/Azure Web Application Firewall (WAF)/Analytic Rules/App-GW-WAF-Scanner-detection.yaml",
"query": "let Threshold = 3;\nAzureDiagnostics\n| where ResourceProvider == 'MICROSOFT.NETWORK' and Category == 'ApplicationGatewayFirewallLog'\n| where action_s == \"Matched\"\n| where Message contains \"Found User-Agent associated with security scanner\"\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 ResourceProvider == 'MICROSOFT.NETWORK' and Category == 'ApplicationGatewayFirewallLog'\n| where action_s == \"Blocked\"\n) 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\n| where Total_TransactionId >= Threshold\n",
"queryFrequency": "PT6H",
"queryPeriod": "PT6H",
"severity": "High",
"status": "Available",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"DefenseEvasion",
"Discovery",
"Execution",
"InitialAccess",
"Reconnaissance"
],
"tags": [
"Scanner Detection"
],
"techniques": [
"T1046",
"T1190",
"T1203",
"T1548",
"T1595"
],
"templateVersion": "1.0.2",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}