AWS Security Hub - Detect root user lacking MFA

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Id	6b3b9b1d-0d5d-4d4a-9f0f-8d1e2c7a5f44
Rulename	AWS Security Hub - Detect root user lacking 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.
Severity	High
Tactics	PrivilegeEscalation Persistence CredentialAccess DefenseEvasion
Techniques	T1098 T1110 T1556.006
Required data connectors	AWSSecurityHub
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/AWS Security Hub/Analytic Rules/IAMRootUserMFADisabled.yaml
Version	1.0.0
Arm template	6b3b9b1d-0d5d-4d4a-9f0f-8d1e2c7a5f44.json

KQL

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

YAML

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  
status: Available
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/AWS Security Hub/Analytic Rules/IAMRootUserMFADisabled.yaml
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.  
queryPeriod: 1h
triggerOperator: gt
tags:
- PCI DSS v3.2.1
- NIST 800-53 r5
- CIS AWS Foundations Benchmark v1.4.0
alertDetailsOverride:
  alertDisplayNameFormat: AWS Account {{AwsAccountId}} root user lacks MFA
  alertDescriptionFormat: 'AWS Account {{AwsAccountId}} has root user without MFA (Resource: {{RootUserARN}}).'
queryFrequency: 1h
version: 1.0.0
id: 6b3b9b1d-0d5d-4d4a-9f0f-8d1e2c7a5f44
tactics:
- PrivilegeEscalation
- Persistence
- CredentialAccess
- DefenseEvasion
entityMappings:
- fieldMappings:
  - identifier: Name
    columnName: AwsAccountId
  - identifier: CloudAppAccountId
    columnName: RootUserARN
  entityType: Account
requiredDataConnectors:
- dataTypes:
  - AWSSecurityHubFindings
  connectorId: AWSSecurityHub
name: AWS Security Hub - Detect root user lacking MFA
severity: High
customDetails:
  FindingId: AwsSecurityFindingId
  Region: AwsRegion
  ComplianceControlId: ComplianceSecurityControlId
  RootUserARN: RootUserARN
triggerThreshold: 0
kind: Scheduled
relevantTechniques:
- T1098
- T1110
- T1556.006

ARM

{
  "$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 Security Hub/Analytic Rules/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"
    }
  ]
}