Cloudflare - Bad client IP
Id | a7ce6135-9d55-4f14-b058-adc2e920a4fa |
Rulename | Cloudflare - Bad client IP |
Description | Detects requests from IP with bad reputation index. |
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/CloudflareBadClientIp.yaml |
Version | 1.0.0 |
Arm template | a7ce6135-9d55-4f14-b058-adc2e920a4fa.json |
let ip_reputation = dynamic(['unknown', 'badHost', 'greylist', 'securityScanner', 'scan', 'tor']);
Cloudflare
| where ClientIPClass in~ (ip_reputation)
| extend IPCustomEntity = SrcIpAddr
| extend UrlCustomEntity = ClientRequestURI
entityMappings:
- entityType: IP
fieldMappings:
- identifier: Address
columnName: IPCustomEntity
- entityType: URL
fieldMappings:
- identifier: Url
columnName: UrlCustomEntity
queryFrequency: 1h
name: Cloudflare - Bad client IP
kind: Scheduled
tactics:
- InitialAccess
triggerThreshold: 0
query: |
let ip_reputation = dynamic(['unknown', 'badHost', 'greylist', 'securityScanner', 'scan', 'tor']);
Cloudflare
| where ClientIPClass in~ (ip_reputation)
| extend IPCustomEntity = SrcIpAddr
| extend UrlCustomEntity = ClientRequestURI
relevantTechniques:
- T1190
- T1133
triggerOperator: gt
queryPeriod: 1h
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cloudflare/Analytic Rules/CloudflareBadClientIp.yaml
severity: Medium
status: Available
id: a7ce6135-9d55-4f14-b058-adc2e920a4fa
requiredDataConnectors:
- connectorId: CloudflareDataConnector
dataTypes:
- Cloudflare
version: 1.0.0
description: |
'Detects requests from IP with bad reputation index.'
{
"$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/a7ce6135-9d55-4f14-b058-adc2e920a4fa')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/a7ce6135-9d55-4f14-b058-adc2e920a4fa')]",
"properties": {
"alertRuleTemplateName": "a7ce6135-9d55-4f14-b058-adc2e920a4fa",
"customDetails": null,
"description": "'Detects requests from IP with bad reputation index.'\n",
"displayName": "Cloudflare - Bad client IP",
"enabled": true,
"entityMappings": [
{
"entityType": "IP",
"fieldMappings": [
{
"columnName": "IPCustomEntity",
"identifier": "Address"
}
]
},
{
"entityType": "URL",
"fieldMappings": [
{
"columnName": "UrlCustomEntity",
"identifier": "Url"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cloudflare/Analytic Rules/CloudflareBadClientIp.yaml",
"query": "let ip_reputation = dynamic(['unknown', 'badHost', 'greylist', 'securityScanner', 'scan', 'tor']);\nCloudflare\n| where ClientIPClass in~ (ip_reputation)\n| extend IPCustomEntity = SrcIpAddr\n| extend UrlCustomEntity = ClientRequestURI\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"
}
]
}