NGINX - Multiple client errors from single IP address
Id | 42771afe-edb3-4330-bc4a-abf6a5714454 |
Rulename | NGINX - Multiple client errors from single IP address |
Description | Detects multiple client errors from one source in short timeframe |
Severity | Medium |
Tactics | InitialAccess |
Techniques | T1190 T1133 |
Required data connectors | NGINXHTTPServer |
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/NGINX HTTP Server/Analytic Rules/NGINXMultipleClientErrorsFromSingleIP.yaml |
Version | 1.0.0 |
Arm template | 42771afe-edb3-4330-bc4a-abf6a5714454.json |
let threshold = 100;
NGINXHTTPServer
| where tolong(HttpStatusCode) >= 400 and tolong(HttpStatusCode) <= 499
| summarize MultipleClientErrors = count() by SrcIpAddr, bin(TimeGenerated, 5m)
| where MultipleClientErrors > threshold
| extend IPCustomEntity = SrcIpAddr
triggerOperator: gt
id: 42771afe-edb3-4330-bc4a-abf6a5714454
queryFrequency: 1h
entityMappings:
- entityType: IP
fieldMappings:
- columnName: IPCustomEntity
identifier: Address
requiredDataConnectors:
- dataTypes:
- NGINXHTTPServer
connectorId: NGINXHTTPServer
severity: Medium
triggerThreshold: 0
kind: Scheduled
status: Available
queryPeriod: 1h
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/NGINX HTTP Server/Analytic Rules/NGINXMultipleClientErrorsFromSingleIP.yaml
query: |
let threshold = 100;
NGINXHTTPServer
| where tolong(HttpStatusCode) >= 400 and tolong(HttpStatusCode) <= 499
| summarize MultipleClientErrors = count() by SrcIpAddr, bin(TimeGenerated, 5m)
| where MultipleClientErrors > threshold
| extend IPCustomEntity = SrcIpAddr
description: |
'Detects multiple client errors from one source in short timeframe'
name: NGINX - Multiple client errors from single IP address
relevantTechniques:
- T1190
- T1133
tactics:
- InitialAccess
version: 1.0.0
{
"$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/42771afe-edb3-4330-bc4a-abf6a5714454')]",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/42771afe-edb3-4330-bc4a-abf6a5714454')]",
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
"kind": "Scheduled",
"apiVersion": "2022-11-01",
"properties": {
"displayName": "NGINX - Multiple client errors from single IP address",
"description": "'Detects multiple client errors from one source in short timeframe'\n",
"severity": "Medium",
"enabled": true,
"query": "let threshold = 100;\nNGINXHTTPServer\n| where tolong(HttpStatusCode) >= 400 and tolong(HttpStatusCode) <= 499 \n| summarize MultipleClientErrors = count() by SrcIpAddr, bin(TimeGenerated, 5m)\n| where MultipleClientErrors > threshold\n| extend IPCustomEntity = SrcIpAddr\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0,
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"InitialAccess"
],
"techniques": [
"T1190",
"T1133"
],
"alertRuleTemplateName": "42771afe-edb3-4330-bc4a-abf6a5714454",
"customDetails": null,
"entityMappings": [
{
"fieldMappings": [
{
"identifier": "Address",
"columnName": "IPCustomEntity"
}
],
"entityType": "IP"
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/NGINX HTTP Server/Analytic Rules/NGINXMultipleClientErrorsFromSingleIP.yaml",
"templateVersion": "1.0.0",
"status": "Available"
}
}
]
}