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Vulnerable Machines related to OMIGOD CVE-2021-38647

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Id4d94d4a9-dc96-450a-9dea-4d4d4594199b
RulenameVulnerable Machines related to OMIGOD CVE-2021-38647
DescriptionThis query uses the Azure Defender Security Nested Recommendations data to find machines vulnerable to OMIGOD CVE-2021-38647.

OMI is the Linux equivalent of Windows WMI and helps users manage configurations across remote and local environments. The query aims to find machines that have this OMI vulnerability (CVE-2021-38647).

Security Nested Recommendations data is sent to Microsoft Sentinel using the continuous export feature of Azure Defender(refrence link below).

Reference: https://www.wiz.io/blog/omigod-critical-vulnerabilities-in-omi-azure

Reference: https://docs.microsoft.com/azure/security-center/continuous-export?tabs=azure-portal
SeverityHigh
TacticsInitialAccess
Execution
TechniquesT1190
T1203
KindScheduled
Query frequency1d
Query period1d
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Detections/SecurityNestedRecommendation/OMIGODVulnerableMachines.yaml
Version1.0.5
Arm template4d94d4a9-dc96-450a-9dea-4d4d4594199b.json
Deploy To Azure
SecurityNestedRecommendation
| where RemediationDescription has 'CVE-2021-38647'
| parse ResourceDetails with * 'virtualMachines/' VirtualMAchine '"' *
| summarize arg_min(TimeGenerated, *) by TenantId, RecommendationSubscriptionId, VirtualMAchine, RecommendationName,Description,RemediationDescription, tostring(AdditionalData),VulnerabilityId
| extend HostName = tostring(split(VirtualMAchine, ".")[0]), DomainIndex = toint(indexof(VirtualMAchine, '.'))
| extend HostNameDomain = iff(DomainIndex != -1, substring(VirtualMAchine, DomainIndex + 1), VirtualMAchine)
triggerOperator: gt
tactics:
- InitialAccess
- Execution
queryPeriod: 1d
kind: Scheduled
relevantTechniques:
- T1190
- T1203
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/SecurityNestedRecommendation/OMIGODVulnerableMachines.yaml
queryFrequency: 1d
description: |
  'This query uses the Azure Defender Security Nested Recommendations data to find machines vulnerable to OMIGOD CVE-2021-38647.
  OMI is the Linux equivalent of Windows WMI and helps users manage configurations across remote and local environments. The query aims to find machines that have this OMI vulnerability (CVE-2021-38647).
   Security Nested Recommendations data is sent to Microsoft Sentinel using the continuous export feature of Azure Defender(refrence link below).
   Reference: https://www.wiz.io/blog/omigod-critical-vulnerabilities-in-omi-azure
   Reference: https://docs.microsoft.com/azure/security-center/continuous-export?tabs=azure-portal'  
requiredDataConnectors: []
version: 1.0.5
tags:
- OMIGOD
- CVE-2021-38647
triggerThreshold: 0
severity: High
metadata:
  author:
    name: Microsoft Security Research
  categories:
    domains:
    - Security - Threat Protection
  source:
    kind: Community
  support:
    tier: Community
id: 4d94d4a9-dc96-450a-9dea-4d4d4594199b
entityMappings:
- entityType: Host
  fieldMappings:
  - columnName: VirtualMAchine
    identifier: FullName
  - columnName: HostName
    identifier: HostName
  - columnName: HostNameDomain
    identifier: NTDomain
name: Vulnerable Machines related to OMIGOD CVE-2021-38647
query: |
  SecurityNestedRecommendation
  | where RemediationDescription has 'CVE-2021-38647'
  | parse ResourceDetails with * 'virtualMachines/' VirtualMAchine '"' *
  | summarize arg_min(TimeGenerated, *) by TenantId, RecommendationSubscriptionId, VirtualMAchine, RecommendationName,Description,RemediationDescription, tostring(AdditionalData),VulnerabilityId
  | extend HostName = tostring(split(VirtualMAchine, ".")[0]), DomainIndex = toint(indexof(VirtualMAchine, '.'))
  | extend HostNameDomain = iff(DomainIndex != -1, substring(VirtualMAchine, DomainIndex + 1), VirtualMAchine)  
{
  "$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/4d94d4a9-dc96-450a-9dea-4d4d4594199b')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/4d94d4a9-dc96-450a-9dea-4d4d4594199b')]",
      "properties": {
        "alertRuleTemplateName": "4d94d4a9-dc96-450a-9dea-4d4d4594199b",
        "customDetails": null,
        "description": "'This query uses the Azure Defender Security Nested Recommendations data to find machines vulnerable to OMIGOD CVE-2021-38647.\nOMI is the Linux equivalent of Windows WMI and helps users manage configurations across remote and local environments. The query aims to find machines that have this OMI vulnerability (CVE-2021-38647).\n Security Nested Recommendations data is sent to Microsoft Sentinel using the continuous export feature of Azure Defender(refrence link below).\n Reference: https://www.wiz.io/blog/omigod-critical-vulnerabilities-in-omi-azure\n Reference: https://docs.microsoft.com/azure/security-center/continuous-export?tabs=azure-portal'\n",
        "displayName": "Vulnerable Machines related to OMIGOD CVE-2021-38647",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "VirtualMAchine",
                "identifier": "FullName"
              },
              {
                "columnName": "HostName",
                "identifier": "HostName"
              },
              {
                "columnName": "HostNameDomain",
                "identifier": "NTDomain"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Detections/SecurityNestedRecommendation/OMIGODVulnerableMachines.yaml",
        "query": "SecurityNestedRecommendation\n| where RemediationDescription has 'CVE-2021-38647'\n| parse ResourceDetails with * 'virtualMachines/' VirtualMAchine '\"' *\n| summarize arg_min(TimeGenerated, *) by TenantId, RecommendationSubscriptionId, VirtualMAchine, RecommendationName,Description,RemediationDescription, tostring(AdditionalData),VulnerabilityId\n| extend HostName = tostring(split(VirtualMAchine, \".\")[0]), DomainIndex = toint(indexof(VirtualMAchine, '.'))\n| extend HostNameDomain = iff(DomainIndex != -1, substring(VirtualMAchine, DomainIndex + 1), VirtualMAchine)\n",
        "queryFrequency": "P1D",
        "queryPeriod": "P1D",
        "severity": "High",
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Execution",
          "InitialAccess"
        ],
        "tags": [
          "OMIGOD",
          "CVE-2021-38647"
        ],
        "techniques": [
          "T1190",
          "T1203"
        ],
        "templateVersion": "1.0.5",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}