OMI Vulnerability Exploitation

Back


Id	3cc5ccd8-b416-4141-bb2d-4eba370e37a5
Rulename	OMI Vulnerability Exploitation
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.
Severity	Medium
Tactics	InitialAccess
Techniques	T1190
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/Heartbeat/OMI_vulnerability_detection.yaml
Version	1.1.5
Arm template	3cc5ccd8-b416-4141-bb2d-4eba370e37a5.json

KQL

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

YAML

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

ARM