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 connectorsOracleWebLogicServer
KindScheduled
Query frequency1h
Query period1h
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/OracleWebLogicServer/Analytic Rules/OracleWebLogicDifferentUAsFromSingleIP.yaml
Version1.0.1
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
name: Oracle - Multiple user agents for single source
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  
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/OracleWebLogicServer/Analytic Rules/OracleWebLogicDifferentUAsFromSingleIP.yaml
queryFrequency: 1h
triggerThreshold: 0
requiredDataConnectors:
- dataTypes:
  - OracleWebLogicServerEvent
  connectorId: OracleWebLogicServer
version: 1.0.1
status: Available
queryPeriod: 1h
id: 44c7d12a-573f-11ec-bf63-0242ac130002
triggerOperator: gt
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
  entityType: IP
relevantTechniques:
- T1190
- T1133
severity: Medium
description: |
    'Detects requests with different user agents from one source in short timeframe.'
kind: Scheduled
tactics:
- InitialAccess
{
  "$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/44c7d12a-573f-11ec-bf63-0242ac130002')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/44c7d12a-573f-11ec-bf63-0242ac130002')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01",
      "properties": {
        "displayName": "Oracle - Multiple user agents for single source",
        "description": "'Detects requests with different user agents from one source in short timeframe.'\n",
        "severity": "Medium",
        "enabled": true,
        "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",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess"
        ],
        "techniques": [
          "T1190",
          "T1133"
        ],
        "alertRuleTemplateName": "44c7d12a-573f-11ec-bf63-0242ac130002",
        "customDetails": null,
        "entityMappings": [
          {
            "fieldMappings": [
              {
                "identifier": "Address",
                "columnName": "IPCustomEntity"
              }
            ],
            "entityType": "IP"
          }
        ],
        "status": "Available",
        "templateVersion": "1.0.1",
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/OracleWebLogicServer/Analytic Rules/OracleWebLogicDifferentUAsFromSingleIP.yaml"
      }
    }
  ]
}