Microsoft Sentinel Analytic Rules
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OCI - Multiple instances terminated

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Id252e651d-d825-480c-bdeb-8b239354577d
RulenameOCI - Multiple instances terminated
DescriptionDetects when multiple instances were terminated.
SeverityHigh
TacticsImpact
TechniquesT1529
Required data connectorsOracleCloudInfrastructureLogsConnector
KindScheduled
Query frequency1h
Query period1h
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Oracle Cloud Infrastructure/Analytic Rules/OCIMultipleInstancesTerminated.yaml
Version1.0.1
Arm template252e651d-d825-480c-bdeb-8b239354577d.json
Deploy To Azure
let threshold = 5;
OCILogs
| where data_eventName_s =~ 'TerminateInstance'
| summarize count() by SrcIpAddr, bin(TimeGenerated, 10m)
| where count_ >= threshold
| extend IPCustomEntity = SrcIpAddr
queryFrequency: 1h
tactics:
- Impact
queryPeriod: 1h
kind: Scheduled
relevantTechniques:
- T1529
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Oracle Cloud Infrastructure/Analytic Rules/OCIMultipleInstancesTerminated.yaml
description: |
    'Detects when multiple instances were terminated.'
requiredDataConnectors:
- dataTypes:
  - OCILogs
  connectorId: OracleCloudInfrastructureLogsConnector
version: 1.0.1
triggerThreshold: 0
severity: High
triggerOperator: gt
id: 252e651d-d825-480c-bdeb-8b239354577d
entityMappings:
- entityType: IP
  fieldMappings:
  - columnName: IPCustomEntity
    identifier: Address
status: Available
name: OCI - Multiple instances terminated
query: |
  let threshold = 5;
  OCILogs
  | where data_eventName_s =~ 'TerminateInstance'
  | summarize count() by SrcIpAddr, bin(TimeGenerated, 10m)
  | where count_ >= threshold
  | extend IPCustomEntity = SrcIpAddr  
{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2023-02-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/252e651d-d825-480c-bdeb-8b239354577d')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/252e651d-d825-480c-bdeb-8b239354577d')]",
      "properties": {
        "alertRuleTemplateName": "252e651d-d825-480c-bdeb-8b239354577d",
        "customDetails": null,
        "description": "'Detects when multiple instances were terminated.'\n",
        "displayName": "OCI - Multiple instances terminated",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IPCustomEntity",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Oracle Cloud Infrastructure/Analytic Rules/OCIMultipleInstancesTerminated.yaml",
        "query": "let threshold = 5;\nOCILogs\n| where data_eventName_s =~ 'TerminateInstance'\n| summarize count() by SrcIpAddr, bin(TimeGenerated, 10m)\n| where count_ >= threshold\n| extend IPCustomEntity = SrcIpAddr\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "High",
        "status": "Available",
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Impact"
        ],
        "techniques": [
          "T1529"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}