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

id: 3cc5ccd8-b416-4141-bb2d-4eba370e37a5
tactics:
- InitialAccess
queryPeriod: 1d
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/Heartbeat/OMI_vulnerability_detection.yaml
metadata:
  categories:
    domains:
    - Security - Vulnerability Management
  source:
    kind: Community
  support:
    tier: Community
  author:
    name: Ron Marsiano
triggerThreshold: 0
name: OMI Vulnerability Exploitation
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  
severity: Medium
customDetails:
  OSName: OSName
  HostIp: ComputerIP
  OSType: OSType
triggerOperator: gt
kind: Scheduled
relevantTechniques:
- T1190
tags:
- OMIGOD
- CVE-2021-38647
queryFrequency: 1d
requiredDataConnectors: []
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.  
version: 1.1.5
entityMappings:
- fieldMappings:
  - columnName: Computer
    identifier: HostName
  entityType: Host
- fieldMappings:
  - columnName: ResourceId
    identifier: ResourceId
  entityType: AzureResource

{
  "$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/3cc5ccd8-b416-4141-bb2d-4eba370e37a5')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/3cc5ccd8-b416-4141-bb2d-4eba370e37a5')]",
      "properties": {
        "alertRuleTemplateName": "3cc5ccd8-b416-4141-bb2d-4eba370e37a5",
        "customDetails": {
          "HostIp": "ComputerIP",
          "OSName": "OSName",
          "OSType": "OSType"
        },
        "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.\nThis 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.\n",
        "displayName": "OMI Vulnerability Exploitation",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "Computer",
                "identifier": "HostName"
              }
            ]
          },
          {
            "entityType": "AzureResource",
            "fieldMappings": [
              {
                "columnName": "ResourceId",
                "identifier": "ResourceId"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Detections/Heartbeat/OMI_vulnerability_detection.yaml",
        "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",
        "severity": "Medium",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess"
        ],
        "tags": [
          "OMIGOD",
          "CVE-2021-38647"
        ],
        "techniques": [
          "T1190"
        ],
        "templateVersion": "1.1.5",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}