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

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

{
  "$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"
    }
  ]
}