Cloudflare - Multiple error requests from single source
Id | ef877d68-755f-4cf1-ac1d-f336e395667c |
Rulename | Cloudflare - Multiple error requests from single source |
Description | Detects multiple failure requests from single source in short timeframe. |
Severity | Low |
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/CloudflareMultipleErrorsSource.yaml |
Version | 1.0.0 |
Arm template | ef877d68-755f-4cf1-ac1d-f336e395667c.json |
let threshold = 100;
Cloudflare
| where HttpRequestMethod =~ 'GET'
| summarize err_cnt = count() by SrcIpAddr, bin(TimeGenerated, 5m)
| where err_cnt > threshold
| extend IPCustomEntity = SrcIpAddr
description: |
'Detects multiple failure requests from single source in short timeframe.'
queryPeriod: 1h
name: Cloudflare - Multiple error requests from single source
triggerThreshold: 0
tactics:
- InitialAccess
severity: Low
kind: Scheduled
entityMappings:
- entityType: IP
fieldMappings:
- identifier: Address
columnName: IPCustomEntity
queryFrequency: 1h
triggerOperator: gt
id: ef877d68-755f-4cf1-ac1d-f336e395667c
status: Available
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cloudflare/Analytic Rules/CloudflareMultipleErrorsSource.yaml
version: 1.0.0
query: |
let threshold = 100;
Cloudflare
| where HttpRequestMethod =~ 'GET'
| summarize err_cnt = count() by SrcIpAddr, bin(TimeGenerated, 5m)
| where err_cnt > threshold
| extend IPCustomEntity = SrcIpAddr
requiredDataConnectors:
- connectorId: CloudflareDataConnector
dataTypes:
- Cloudflare
relevantTechniques:
- T1190
- T1133
{
"$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/ef877d68-755f-4cf1-ac1d-f336e395667c')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/ef877d68-755f-4cf1-ac1d-f336e395667c')]",
"properties": {
"alertRuleTemplateName": "ef877d68-755f-4cf1-ac1d-f336e395667c",
"customDetails": null,
"description": "'Detects multiple failure requests from single source in short timeframe.'\n",
"displayName": "Cloudflare - Multiple error requests from single source",
"enabled": true,
"entityMappings": [
{
"entityType": "IP",
"fieldMappings": [
{
"columnName": "IPCustomEntity",
"identifier": "Address"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cloudflare/Analytic Rules/CloudflareMultipleErrorsSource.yaml",
"query": "let threshold = 100;\nCloudflare\n| where HttpRequestMethod =~ 'GET'\n| summarize err_cnt = count() by SrcIpAddr, bin(TimeGenerated, 5m)\n| where err_cnt > threshold\n| extend IPCustomEntity = SrcIpAddr\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"severity": "Low",
"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"
}
]
}