OracleDBAudit - User connected to database from new IP

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Id	39a0995e-f4a9-4869-a0ae-36d6d9049bfd
Rulename	OracleDBAudit - User connected to database from new IP
Description	Detects when a user connects to database from new IP address.
Severity	Low
Tactics	InitialAccess
Techniques	T1078
Required data connectors	OracleDatabaseAudit SyslogAma
Kind	Scheduled
Query frequency	1h
Query period	14d
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/OracleDatabaseAudit/Analytic Rules/OracleDBAuditNewIpForUser.yaml
Version	1.0.1
Arm template	39a0995e-f4a9-4869-a0ae-36d6d9049bfd.json

KQL

let lbtime_d = 14d;
let lbtime_24h = 24h;
OracleDatabaseAuditEvent
| where TimeGenerated between (ago(lbtime_d) .. ago(lbtime_24h))
| where isnotempty(SrcIpAddr)
| where isnotempty(DstUserName)
| summarize knownIPs = make_set(SrcIpAddr) by DstUserName
| join (OracleDatabaseAuditEvent
      | where isnotempty(SrcIpAddr)
      | where isnotempty(DstUserName)
      | where DbAction =~ 'connect'
      ) on DstUserName
| where knownIPs !contains SrcIpAddr
| project DstUserName, SrcIpAddr
| extend AccountCustomEntity = DstUserName
| extend IPCustomEntity = SrcIpAddr

YAML

relevantTechniques:
- T1078
name: OracleDBAudit - User connected to database from new IP
requiredDataConnectors:
- dataTypes:
  - Syslog
  connectorId: OracleDatabaseAudit
- datatypes:
  - Syslog
  connectorId: SyslogAma
entityMappings:
- fieldMappings:
  - identifier: FullName
    columnName: AccountCustomEntity
  entityType: Account
- fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
  entityType: IP
triggerThreshold: 0
id: 39a0995e-f4a9-4869-a0ae-36d6d9049bfd
tactics:
- InitialAccess
version: 1.0.1
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/OracleDatabaseAudit/Analytic Rules/OracleDBAuditNewIpForUser.yaml
queryPeriod: 14d
kind: Scheduled
queryFrequency: 1h
severity: Low
status: Available
description: |
    'Detects when a user connects to database from new IP address.'
query: |
  let lbtime_d = 14d;
  let lbtime_24h = 24h;
  OracleDatabaseAuditEvent
  | where TimeGenerated between (ago(lbtime_d) .. ago(lbtime_24h))
  | where isnotempty(SrcIpAddr)
  | where isnotempty(DstUserName)
  | summarize knownIPs = make_set(SrcIpAddr) by DstUserName
  | join (OracleDatabaseAuditEvent
        | where isnotempty(SrcIpAddr)
        | where isnotempty(DstUserName)
        | where DbAction =~ 'connect'
        ) on DstUserName
  | where knownIPs !contains SrcIpAddr
  | project DstUserName, SrcIpAddr
  | extend AccountCustomEntity = DstUserName
  | extend IPCustomEntity = SrcIpAddr  
triggerOperator: gt

ARM

{
  "$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/39a0995e-f4a9-4869-a0ae-36d6d9049bfd')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/39a0995e-f4a9-4869-a0ae-36d6d9049bfd')]",
      "properties": {
        "alertRuleTemplateName": "39a0995e-f4a9-4869-a0ae-36d6d9049bfd",
        "customDetails": null,
        "description": "'Detects when a user connects to database from new IP address.'\n",
        "displayName": "OracleDBAudit - User connected to database from new IP",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountCustomEntity",
                "identifier": "FullName"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IPCustomEntity",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/OracleDatabaseAudit/Analytic Rules/OracleDBAuditNewIpForUser.yaml",
        "query": "let lbtime_d = 14d;\nlet lbtime_24h = 24h;\nOracleDatabaseAuditEvent\n| where TimeGenerated between (ago(lbtime_d) .. ago(lbtime_24h))\n| where isnotempty(SrcIpAddr)\n| where isnotempty(DstUserName)\n| summarize knownIPs = make_set(SrcIpAddr) by DstUserName\n| join (OracleDatabaseAuditEvent\n      | where isnotempty(SrcIpAddr)\n      | where isnotempty(DstUserName)\n      | where DbAction =~ 'connect'\n      ) on DstUserName\n| where knownIPs !contains SrcIpAddr\n| project DstUserName, SrcIpAddr\n| extend AccountCustomEntity = DstUserName\n| extend IPCustomEntity = SrcIpAddr\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "P14D",
        "severity": "Low",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess"
        ],
        "techniques": [
          "T1078"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}