OMI Vulnerability Exploitation

let OMIVulnerabilityPatchVersion = "OMIVulnerabilityPatchVersion:1.13.40-0";
Heartbeat
| where Category == "Direct Agent"
| summarize arg_max(TimeGenerated,*) by Computer
| parse strcat("Version:" , Version) with * "Version:" Major:long "."
Minor:long "." Patch:long "-" *
| parse OMIVulnerabilityPatchVersion with * "OMIVulnerabilityPatchVersion:"
OMIVersionMajor:long "." OMIVersionMinor:long "." OMIVersionPatch:long "-" *
| where Major <OMIVersionMajor or (Major==OMIVersionMajor and Minor
<OMIVersionMinor) or (Major==OMIVersionMajor and Minor==OMIVersionMinor and
Patch<OMIVersionPatch) 
| project Version, Major,Minor,Patch,
Computer,ComputerIP,OSType,OSName,ResourceId

kind: Scheduled
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/Heartbeat/OMI_vulnerability_detection.yaml
severity: Medium
tags:
- OMIGOD
- CVE-2021-38647
name: OMI Vulnerability Exploitation
entityMappings:
- entityType: Host
  fieldMappings:
  - columnName: Computer
    identifier: HostName
- entityType: AzureResource
  fieldMappings:
  - columnName: ResourceId
    identifier: ResourceId
metadata:
  support:
    tier: Community
  categories:
    domains:
    - Security - Vulnerability Management
  source:
    kind: Community
  author:
    name: Ron Marsiano
queryFrequency: 1d
triggerThreshold: 0
queryPeriod: 1d
description: |
  Following the September 14th, 2021 release of three Elevation of Privilege
  (EoP) vulnerabilities (CVE-2021-38645, CVE-2021-38649, CVE-2021-38648) and one
  unauthenticated Remote Code Execution (RCE) vulnerability (CVE-2021-38647) in
  the Open Management Infrastructure (OMI) Framework.
  This detection validates that any OMS-agent that is reporting to the Microsoft
  Sentinel workspace is updated with the patch. The detection will go over the
  heartbeats received from all agents over the last day and will create alert
  for those agents who are not updated.  
id: 3cc5ccd8-b416-4141-bb2d-4eba370e37a5
customDetails:
  OSType: OSType
  HostIp: ComputerIP
  OSName: OSName
version: 1.1.3
tactics:
- InitialAccess
query: |
  let OMIVulnerabilityPatchVersion = "OMIVulnerabilityPatchVersion:1.13.40-0";
  Heartbeat
  | where Category == "Direct Agent"
  | summarize arg_max(TimeGenerated,*) by Computer
  | parse strcat("Version:" , Version) with * "Version:" Major:long "."
  Minor:long "." Patch:long "-" *
  | parse OMIVulnerabilityPatchVersion with * "OMIVulnerabilityPatchVersion:"
  OMIVersionMajor:long "." OMIVersionMinor:long "." OMIVersionPatch:long "-" *
  | where Major <OMIVersionMajor or (Major==OMIVersionMajor and Minor
  <OMIVersionMinor) or (Major==OMIVersionMajor and Minor==OMIVersionMinor and
  Patch<OMIVersionPatch) 
  | project Version, Major,Minor,Patch,
  Computer,ComputerIP,OSType,OSName,ResourceId  
requiredDataConnectors: []
triggerOperator: gt

{
  "$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/3cc5ccd8-b416-4141-bb2d-4eba370e37a5')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/3cc5ccd8-b416-4141-bb2d-4eba370e37a5')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01-preview",
      "properties": {
        "displayName": "OMI Vulnerability Exploitation",
        "description": "Following the September 14th, 2021 release of three Elevation of Privilege\n(EoP) vulnerabilities (CVE-2021-38645, CVE-2021-38649, CVE-2021-38648) and one\nunauthenticated Remote Code Execution (RCE) vulnerability (CVE-2021-38647) in\nthe Open Management Infrastructure (OMI) Framework.\nThis detection validates that any OMS-agent that is reporting to the Microsoft\nSentinel workspace is updated with the patch. The detection will go over the\nheartbeats received from all agents over the last day and will create alert\nfor those agents who are not updated.\n",
        "severity": "Medium",
        "enabled": true,
        "query": "let OMIVulnerabilityPatchVersion = \"OMIVulnerabilityPatchVersion:1.13.40-0\";\nHeartbeat\n| where Category == \"Direct Agent\"\n| summarize arg_max(TimeGenerated,*) by Computer\n| parse strcat(\"Version:\" , Version) with * \"Version:\" Major:long \".\"\nMinor:long \".\" Patch:long \"-\" *\n| parse OMIVulnerabilityPatchVersion with * \"OMIVulnerabilityPatchVersion:\"\nOMIVersionMajor:long \".\" OMIVersionMinor:long \".\" OMIVersionPatch:long \"-\" *\n| where Major <OMIVersionMajor or (Major==OMIVersionMajor and Minor\n<OMIVersionMinor) or (Major==OMIVersionMajor and Minor==OMIVersionMinor and\nPatch<OMIVersionPatch) \n| project Version, Major,Minor,Patch,\nComputer,ComputerIP,OSType,OSName,ResourceId\n",
        "queryFrequency": "P1D",
        "queryPeriod": "P1D",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess"
        ],
        "alertRuleTemplateName": "3cc5ccd8-b416-4141-bb2d-4eba370e37a5",
        "customDetails": {
          "OSType": "OSType",
          "HostIp": "ComputerIP",
          "OSName": "OSName"
        },
        "entityMappings": [
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "identifier": "HostName",
                "columnName": "Computer"
              }
            ]
          },
          {
            "entityType": "AzureResource",
            "fieldMappings": [
              {
                "identifier": "ResourceId",
                "columnName": "ResourceId"
              }
            ]
          }
        ],
        "templateVersion": "1.1.3",
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Detections/Heartbeat/OMI_vulnerability_detection.yaml",
        "tags": [
          "OMIGOD",
          "CVE-2021-38647"
        ]
      }
    }
  ]
}