Cloudflare - Empty user agent
Id | 729c6d21-fad9-4a6a-9c7f-482393c95957 |
Rulename | Cloudflare - Empty user agent |
Description | Detects requests where user agent is empty. |
Severity | Medium |
Tactics | InitialAccess |
Techniques | T1190 T1133 |
Required data connectors | CloudflareDataConnector |
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/Cloudflare/Analytic Rules/CloudflareEmptyUA.yaml |
Version | 1.0.0 |
Arm template | 729c6d21-fad9-4a6a-9c7f-482393c95957.json |
Cloudflare
| where isempty(HttpUserAgentOriginal)
| extend IPCustomEntity = SrcIpAddr
name: Cloudflare - Empty user agent
query: |
Cloudflare
| where isempty(HttpUserAgentOriginal)
| extend IPCustomEntity = SrcIpAddr
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cloudflare/Analytic Rules/CloudflareEmptyUA.yaml
queryFrequency: 1h
triggerThreshold: 0
requiredDataConnectors:
- dataTypes:
- Cloudflare
connectorId: CloudflareDataConnector
version: 1.0.0
status: Available
queryPeriod: 1h
id: 729c6d21-fad9-4a6a-9c7f-482393c95957
triggerOperator: gt
entityMappings:
- fieldMappings:
- identifier: Address
columnName: IPCustomEntity
entityType: IP
relevantTechniques:
- T1190
- T1133
severity: Medium
description: |
'Detects requests where user agent is empty.'
kind: Scheduled
tactics:
- InitialAccess
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"workspace": {
"type": "String"
}
},
"resources": [
{
"id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/729c6d21-fad9-4a6a-9c7f-482393c95957')]",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/729c6d21-fad9-4a6a-9c7f-482393c95957')]",
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
"kind": "Scheduled",
"apiVersion": "2022-11-01",
"properties": {
"displayName": "Cloudflare - Empty user agent",
"description": "'Detects requests where user agent is empty.'\n",
"severity": "Medium",
"enabled": true,
"query": "Cloudflare\n| where isempty(HttpUserAgentOriginal)\n| extend IPCustomEntity = SrcIpAddr\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0,
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"InitialAccess"
],
"techniques": [
"T1190",
"T1133"
],
"alertRuleTemplateName": "729c6d21-fad9-4a6a-9c7f-482393c95957",
"customDetails": null,
"entityMappings": [
{
"fieldMappings": [
{
"identifier": "Address",
"columnName": "IPCustomEntity"
}
],
"entityType": "IP"
}
],
"status": "Available",
"templateVersion": "1.0.0",
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cloudflare/Analytic Rules/CloudflareEmptyUA.yaml"
}
}
]
}