Microsoft Sentinel Analytic Rules
cloudbrothers.infoAzure Sentinel RepoToggle Dark/Light/Auto modeToggle Dark/Light/Auto modeToggle Dark/Light/Auto modeBack to homepage

Azure secure score block legacy authentication

Back
IdC27BB559-28C5-4924-A7DA-3BF04CD02C8F
RulenameAzure secure score block legacy authentication
DescriptionThis query searches for most compromising sign-in attempts come from legacy authentication.

Older office clients such as Office 2010 do not support modern authentication

and use legacy protocols such as IMAP, SMTP, and POP3.

Legacy authentication does not support multi-factor authentication (MFA).

Even if an MFA policy is configured in your environment, bad actors can

bypass these enforcements through legacy protocols.
SeverityHigh
TacticsCredentialAccess
TechniquesT1212
T1556
Required data connectorsSenservaPro
KindScheduled
Query frequency6h
Query period6h
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/SenservaPro/Analytic Rules/BlockLegacyAuthentication.yaml
Version1.0.0
Arm templateC27BB559-28C5-4924-A7DA-3BF04CD02C8F.json
Deploy To Azure
SenservaPro_CL
| where ControlName_s == 'AzureSecureScoreBlockLegacyAuthentication'
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/SenservaPro/Analytic Rules/BlockLegacyAuthentication.yaml
entityMappings:
- fieldMappings:
  - identifier: Name
    columnName: ControlName_s
  - identifier: AadTenantId
    columnName: TenantId
  - identifier: DisplayName
    columnName: TenantDisplayName_s
  entityType: Account
- fieldMappings:
  - identifier: DistinguishedName
    columnName: Group_s
  entityType: SecurityGroup
- fieldMappings:
  - identifier: ResourceId
    columnName: SourceSystem
  entityType: AzureResource
kind: Scheduled
query: |
  SenservaPro_CL
  | where ControlName_s == 'AzureSecureScoreBlockLegacyAuthentication'  
triggerOperator: gt
version: 1.0.0
queryPeriod: 6h
name: Azure secure score block legacy authentication
severity: High
relevantTechniques:
- T1212
- T1556
requiredDataConnectors:
- dataTypes:
  - SenservaPro_CL
  connectorId: SenservaPro
triggerThreshold: 0
tactics:
- CredentialAccess
queryFrequency: 6h
id: C27BB559-28C5-4924-A7DA-3BF04CD02C8F
status: Available
description: |
  'This query searches for most compromising sign-in attempts come from legacy authentication. 
   Older office clients such as Office 2010 do not support modern authentication 
   and use legacy protocols such as IMAP, SMTP, and POP3. 
   Legacy authentication does not support multi-factor authentication (MFA).
   Even if an MFA policy is configured in your environment, bad actors can 
   bypass these enforcements through legacy protocols.'  
{
  "$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/C27BB559-28C5-4924-A7DA-3BF04CD02C8F')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/C27BB559-28C5-4924-A7DA-3BF04CD02C8F')]",
      "properties": {
        "alertRuleTemplateName": "C27BB559-28C5-4924-A7DA-3BF04CD02C8F",
        "customDetails": null,
        "description": "'This query searches for most compromising sign-in attempts come from legacy authentication. \n Older office clients such as Office 2010 do not support modern authentication \n and use legacy protocols such as IMAP, SMTP, and POP3. \n Legacy authentication does not support multi-factor authentication (MFA).\n Even if an MFA policy is configured in your environment, bad actors can \n bypass these enforcements through legacy protocols.'\n",
        "displayName": "Azure secure score block legacy authentication",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "ControlName_s",
                "identifier": "Name"
              },
              {
                "columnName": "TenantId",
                "identifier": "AadTenantId"
              },
              {
                "columnName": "TenantDisplayName_s",
                "identifier": "DisplayName"
              }
            ]
          },
          {
            "entityType": "SecurityGroup",
            "fieldMappings": [
              {
                "columnName": "Group_s",
                "identifier": "DistinguishedName"
              }
            ]
          },
          {
            "entityType": "AzureResource",
            "fieldMappings": [
              {
                "columnName": "SourceSystem",
                "identifier": "ResourceId"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/SenservaPro/Analytic Rules/BlockLegacyAuthentication.yaml",
        "query": "SenservaPro_CL\n| where ControlName_s == 'AzureSecureScoreBlockLegacyAuthentication'\n",
        "queryFrequency": "PT6H",
        "queryPeriod": "PT6H",
        "severity": "High",
        "status": "Available",
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CredentialAccess"
        ],
        "techniques": [
          "T1212",
          "T1556"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}