Vulnerable Machines related to OMIGOD CVE-2021-38647

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Id	4d94d4a9-dc96-450a-9dea-4d4d4594199b
Rulename	Vulnerable Machines related to OMIGOD CVE-2021-38647
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
Severity	High
Tactics	InitialAccess Execution
Techniques	T1190 T1203
Kind	Scheduled
Query frequency	1d
Query period	1d
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Detections/SecurityNestedRecommendation/OMIGODVulnerableMachines.yaml
Version	1.0.5
Arm template	4d94d4a9-dc96-450a-9dea-4d4d4594199b.json

KQL

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)

YAML

version: 1.0.5
tactics:
- InitialAccess
- Execution
tags:
- OMIGOD
- CVE-2021-38647
relevantTechniques:
- T1190
- T1203
entityMappings:
- fieldMappings:
  - identifier: FullName
    columnName: VirtualMAchine
  - identifier: HostName
    columnName: HostName
  - identifier: NTDomain
    columnName: HostNameDomain
  entityType: Host
triggerThreshold: 0
name: Vulnerable Machines related to OMIGOD CVE-2021-38647
metadata:
  author:
    name: Microsoft Security Research
  support:
    tier: Community
  categories:
    domains:
    - Security - Threat Protection
  source:
    kind: Community
queryFrequency: 1d
triggerOperator: gt
kind: Scheduled
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'  
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/SecurityNestedRecommendation/OMIGODVulnerableMachines.yaml
requiredDataConnectors: []
severity: High
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)  
queryPeriod: 1d
id: 4d94d4a9-dc96-450a-9dea-4d4d4594199b

ARM