Imperva - Multiple user agents from same source
Id | 4e8032eb-f04d-4a30-85d3-b74bf2c8f204 |
Rulename | Imperva - Multiple user agents from same source |
Description | ‘Detects suspicious number of user agents from the same IP address. |
Severity | Medium |
Tactics | InitialAccess |
Techniques | T1190 T1133 |
Required data connectors | ImpervaWAFCloudAPI |
Kind | Scheduled |
Query frequency | 1h |
Query period | 1h |
Trigger threshold | 0 |
Trigger operator | gt |
Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ImpervaCloudWAF/Analytic Rules/ImpervaMultipleUAsSource.yaml |
Version | 1.0.0 |
Arm template | 4e8032eb-f04d-4a30-85d3-b74bf2c8f204.json |
let threshold = 10;
ImpervaWAFCloud
| summarize d_uas = dcount(HttpUserAgentOriginal) by SrcIpAddr, bin(TimeGenerated, 5m)
| where d_uas >= threshold
| extend IPCustomEntity = SrcIpAddr
name: Imperva - Multiple user agents from same source
version: 1.0.0
severity: Medium
queryFrequency: 1h
triggerOperator: gt
relevantTechniques:
- T1190
- T1133
status: Available
description: |
''Detects suspicious number of user agents from the same IP address.'
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ImpervaCloudWAF/Analytic Rules/ImpervaMultipleUAsSource.yaml
requiredDataConnectors:
- connectorId: ImpervaWAFCloudAPI
dataTypes:
- ImpervaWAFCloud
entityMappings:
- fieldMappings:
- identifier: Address
columnName: IPCustomEntity
entityType: IP
tactics:
- InitialAccess
queryPeriod: 1h
query: |
let threshold = 10;
ImpervaWAFCloud
| summarize d_uas = dcount(HttpUserAgentOriginal) by SrcIpAddr, bin(TimeGenerated, 5m)
| where d_uas >= threshold
| extend IPCustomEntity = SrcIpAddr
kind: Scheduled
triggerThreshold: 0
id: 4e8032eb-f04d-4a30-85d3-b74bf2c8f204
{
"$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/4e8032eb-f04d-4a30-85d3-b74bf2c8f204')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/4e8032eb-f04d-4a30-85d3-b74bf2c8f204')]",
"properties": {
"alertRuleTemplateName": "4e8032eb-f04d-4a30-85d3-b74bf2c8f204",
"customDetails": null,
"description": "''Detects suspicious number of user agents from the same IP address.'\n",
"displayName": "Imperva - Multiple user agents from same source",
"enabled": true,
"entityMappings": [
{
"entityType": "IP",
"fieldMappings": [
{
"columnName": "IPCustomEntity",
"identifier": "Address"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ImpervaCloudWAF/Analytic Rules/ImpervaMultipleUAsSource.yaml",
"query": "let threshold = 10;\nImpervaWAFCloud\n| summarize d_uas = dcount(HttpUserAgentOriginal) by SrcIpAddr, bin(TimeGenerated, 5m)\n| where d_uas >= threshold\n| extend IPCustomEntity = SrcIpAddr\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"severity": "Medium",
"status": "Available",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"InitialAccess"
],
"techniques": [
"T1133",
"T1190"
],
"templateVersion": "1.0.0",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}