Microsoft Sentinel Analytic Rules
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Oracle - Multiple user agents for single source

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Id44c7d12a-573f-11ec-bf63-0242ac130002
RulenameOracle - Multiple user agents for single source
DescriptionDetects requests with different user agents 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/OracleWebLogicServer/Analytic Rules/OracleWebLogicDifferentUAsFromSingleIP.yaml
Version1.0.3
Arm template44c7d12a-573f-11ec-bf63-0242ac130002.json
Deploy To Azure
let threshold = 5;
OracleWebLogicServerEvent
| where isnotempty(HttpUserAgentOriginal)
| summarize ua_count=makeset(HttpUserAgentOriginal) by SrcIpAddr, bin(TimeGenerated, 5m)
| where array_length(ua_count) > threshold
| extend IPCustomEntity = SrcIpAddr
kind: Scheduled
queryFrequency: 1h
queryPeriod: 1h
version: 1.0.3
description: |
    'Detects requests with different user agents from one source in short timeframe.'
triggerThreshold: 0
entityMappings:
- fieldMappings:
  - columnName: IPCustomEntity
    identifier: Address
  entityType: IP
tactics:
- InitialAccess
status: Available
relevantTechniques:
- T1190
- T1133
requiredDataConnectors:
- dataTypes:
  - OracleWebLogicServer_CL
  connectorId: CustomLogsAma
severity: Medium
id: 44c7d12a-573f-11ec-bf63-0242ac130002
query: |
  let threshold = 5;
  OracleWebLogicServerEvent
  | where isnotempty(HttpUserAgentOriginal)
  | summarize ua_count=makeset(HttpUserAgentOriginal) by SrcIpAddr, bin(TimeGenerated, 5m)
  | where array_length(ua_count) > threshold
  | extend IPCustomEntity = SrcIpAddr  
triggerOperator: gt
name: Oracle - Multiple user agents for single source
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/OracleWebLogicServer/Analytic Rules/OracleWebLogicDifferentUAsFromSingleIP.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/44c7d12a-573f-11ec-bf63-0242ac130002')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/44c7d12a-573f-11ec-bf63-0242ac130002')]",
      "properties": {
        "alertRuleTemplateName": "44c7d12a-573f-11ec-bf63-0242ac130002",
        "customDetails": null,
        "description": "'Detects requests with different user agents from one source in short timeframe.'\n",
        "displayName": "Oracle - Multiple user agents for single source",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IPCustomEntity",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/OracleWebLogicServer/Analytic Rules/OracleWebLogicDifferentUAsFromSingleIP.yaml",
        "query": "let threshold = 5;\nOracleWebLogicServerEvent\n| where isnotempty(HttpUserAgentOriginal)\n| summarize ua_count=makeset(HttpUserAgentOriginal) by SrcIpAddr, bin(TimeGenerated, 5m)\n| where array_length(ua_count) > 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"
    }
  ]
}