Microsoft Sentinel Analytic Rules
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Apache - Multiple client errors from single IP

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Id15f5a956-3af9-11ec-8d3d-0242ac130003
RulenameApache - Multiple client errors from single IP
DescriptionDetects multiple client errors from one source in short timeframe
SeverityMedium
TacticsInitialAccess
TechniquesT1190
T1133
Required data connectorsCustomLogsAma
KindScheduled
Query frequency1h
Query period1h
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ApacheHTTPServer/Analytic Rules/ApacheMultipleClientErrorsFromSingleIP.yaml
Version1.0.3
Arm template15f5a956-3af9-11ec-8d3d-0242ac130003.json
Deploy To Azure
let threshold = 100;
ApacheHTTPServer
| where HttpStatusCode >= 400 and HttpStatusCode <= 499
| summarize MultipleClientErrors = count() by SrcIpAddr, bin(TimeGenerated, 5m)
| where MultipleClientErrors > threshold
| extend IPCustomEntity = SrcIpAddr
query: |
  let threshold = 100;
  ApacheHTTPServer
  | where HttpStatusCode >= 400 and 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'
triggerThreshold: 0
requiredDataConnectors:
- datatypes:
  - ApacheHTTPServer_CL
  connectorId: CustomLogsAma
name: Apache - Multiple client errors from single IP
relevantTechniques:
- T1190
- T1133
queryPeriod: 1h
severity: Medium
triggerOperator: gt
version: 1.0.3
queryFrequency: 1h
entityMappings:
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
kind: Scheduled
status: Available
tactics:
- InitialAccess
id: 15f5a956-3af9-11ec-8d3d-0242ac130003
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ApacheHTTPServer/Analytic Rules/ApacheMultipleClientErrorsFromSingleIP.yaml
{
  "$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/15f5a956-3af9-11ec-8d3d-0242ac130003')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/15f5a956-3af9-11ec-8d3d-0242ac130003')]",
      "properties": {
        "alertRuleTemplateName": "15f5a956-3af9-11ec-8d3d-0242ac130003",
        "customDetails": null,
        "description": "'Detects multiple client errors from one source in short timeframe'\n",
        "displayName": "Apache - Multiple client errors from single IP",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IPCustomEntity",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ApacheHTTPServer/Analytic Rules/ApacheMultipleClientErrorsFromSingleIP.yaml",
        "query": "let threshold = 100;\nApacheHTTPServer\n| where HttpStatusCode >= 400 and HttpStatusCode <= 499\n| summarize MultipleClientErrors = count() by SrcIpAddr, bin(TimeGenerated, 5m)\n| where MultipleClientErrors > 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": "1.0.3",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}