AWS Security Hub - Detect root user lacking MFA

AWSSecurityHubFindings
| where RecordState == "ACTIVE" and ComplianceStatus == "FAILED"
| where tostring(AwsSecurityFindingGeneratorId) == "security-control/IAM.9"
  or tostring(ComplianceSecurityControlId) == "IAM.9"
| extend RootUserARN = tostring(Resources[0].Id)
| summarize TimeGenerated = max(TimeGenerated)
    by AwsAccountId, AwsRegion, AwsSecurityFindingTitle, AwsSecurityFindingDescription,
       AwsSecurityFindingId, ComplianceSecurityControlId, RootUserARN

tactics:
- PrivilegeEscalation
- Persistence
- CredentialAccess
- DefenseEvasion
name: AWS Security Hub - Detect root user lacking MFA
version: 1.0.0
queryFrequency: 1h
requiredDataConnectors:
- connectorId: AWSSecurityHub
  dataTypes:
  - AWSSecurityHubFindings
customDetails:
  ComplianceControlId: ComplianceSecurityControlId
  FindingId: AwsSecurityFindingId
  Region: AwsRegion
  RootUserARN: RootUserARN
id: 6b3b9b1d-0d5d-4d4a-9f0f-8d1e2c7a5f44
triggerThreshold: 0
tags:
- PCI DSS v3.2.1
- NIST 800-53 r5
- CIS AWS Foundations Benchmark v1.4.0
entityMappings:
- fieldMappings:
  - identifier: Name
    columnName: AwsAccountId
  - identifier: CloudAppAccountId
    columnName: RootUserARN
  entityType: Account
queryPeriod: 1h
severity: High
relevantTechniques:
- T1098
- T1110
- T1556.006
alertDetailsOverride:
  alertDescriptionFormat: 'AWS Account {{AwsAccountId}} has root user without MFA (Resource: {{RootUserARN}}).'
  alertDisplayNameFormat: AWS Account {{AwsAccountId}} root user lacks MFA
description: |
  This query detects AWS accounts where the root user does not have multi-factor authentication (MFA) enabled, using AWS Security Hub control IAM.9 findings.
  Lack of MFA on the root user increases the risk of unauthorized access and privilege abuse.
triggerOperator: gt
status: Available
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/AWS%20Security%20Hub/Analytic%20Rules/IAMRootUserMFADisabled.yaml
kind: Scheduled
query: |
  AWSSecurityHubFindings
  | where RecordState == "ACTIVE" and ComplianceStatus == "FAILED"
  | where tostring(AwsSecurityFindingGeneratorId) == "security-control/IAM.9"
    or tostring(ComplianceSecurityControlId) == "IAM.9"
  | extend RootUserARN = tostring(Resources[0].Id)
  | summarize TimeGenerated = max(TimeGenerated)
      by AwsAccountId, AwsRegion, AwsSecurityFindingTitle, AwsSecurityFindingDescription,
         AwsSecurityFindingId, ComplianceSecurityControlId, RootUserARN

{
  "$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/6b3b9b1d-0d5d-4d4a-9f0f-8d1e2c7a5f44')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/6b3b9b1d-0d5d-4d4a-9f0f-8d1e2c7a5f44')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "AWS Account {{AwsAccountId}} has root user without MFA (Resource: {{RootUserARN}}).",
          "alertDisplayNameFormat": "AWS Account {{AwsAccountId}} root user lacks MFA"
        },
        "alertRuleTemplateName": "6b3b9b1d-0d5d-4d4a-9f0f-8d1e2c7a5f44",
        "customDetails": {
          "ComplianceControlId": "ComplianceSecurityControlId",
          "FindingId": "AwsSecurityFindingId",
          "Region": "AwsRegion",
          "RootUserARN": "RootUserARN"
        },
        "description": "This query detects AWS accounts where the root user does not have multi-factor authentication (MFA) enabled, using AWS Security Hub control IAM.9 findings.\nLack of MFA on the root user increases the risk of unauthorized access and privilege abuse.\n",
        "displayName": "AWS Security Hub - Detect root user lacking MFA",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AwsAccountId",
                "identifier": "Name"
              },
              {
                "columnName": "RootUserARN",
                "identifier": "CloudAppAccountId"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/AWS%20Security%20Hub/Analytic%20Rules/IAMRootUserMFADisabled.yaml",
        "query": "AWSSecurityHubFindings\n| where RecordState == \"ACTIVE\" and ComplianceStatus == \"FAILED\"\n| where tostring(AwsSecurityFindingGeneratorId) == \"security-control/IAM.9\"\n  or tostring(ComplianceSecurityControlId) == \"IAM.9\"\n| extend RootUserARN = tostring(Resources[0].Id)\n| summarize TimeGenerated = max(TimeGenerated)\n    by AwsAccountId, AwsRegion, AwsSecurityFindingTitle, AwsSecurityFindingDescription,\n       AwsSecurityFindingId, ComplianceSecurityControlId, RootUserARN\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "High",
        "status": "Available",
        "subTechniques": [
          "T1556.006"
        ],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CredentialAccess",
          "DefenseEvasion",
          "Persistence",
          "PrivilegeEscalation"
        ],
        "tags": [
          "PCI DSS v3.2.1",
          "NIST 800-53 r5",
          "CIS AWS Foundations Benchmark v1.4.0"
        ],
        "techniques": [
          "T1098",
          "T1110",
          "T1556"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}