MFA disabled for a user

(union isfuzzy=true
(AuditLogs
| where OperationName =~ "Disable Strong Authentication"
| extend IPAddress = tostring(parse_json(tostring(InitiatedBy.user)).ipAddress)
| extend InitiatedByUser = iff(isnotempty(tostring(parse_json(tostring(InitiatedBy.user)).userPrincipalName)),
 tostring(parse_json(tostring(InitiatedBy.user)).userPrincipalName), tostring(parse_json(tostring(InitiatedBy.app)).displayName))
| extend Targetprop = todynamic(TargetResources)
| extend TargetUser = tostring(Targetprop[0].userPrincipalName)
| summarize StartTimeUtc = min(TimeGenerated), EndTimeUtc = max(TimeGenerated) by User = TargetUser, InitiatedByUser , Operation = OperationName , CorrelationId, IPAddress, Category, Source = SourceSystem , AADTenantId, Type
),
(AWSCloudTrail
| where EventName in~ ("DeactivateMFADevice", "DeleteVirtualMFADevice")
| extend InstanceProfileName = tostring(parse_json(RequestParameters).InstanceProfileName)
| extend TargetUser = tostring(parse_json(RequestParameters).userName)
| summarize StartTimeUtc = min(TimeGenerated), EndTimeUtc = max(TimeGenerated) by User = TargetUser, Source = EventSource , Operation = EventName , TenantorInstance_Detail = InstanceProfileName, IPAddress = SourceIpAddress
)
)
| extend timestamp = StartTimeUtc, AccountCustomEntity = User, IPCustomEntity = IPAddress

version: 1.0.3
queryFrequency: 1h
requiredDataConnectors:
- connectorId: AzureActiveDirectory
  dataTypes:
  - AuditLogs
- connectorId: AWS
  dataTypes:
  - AWSCloudTrail
entityMappings:
- fieldMappings:
  - columnName: AccountCustomEntity
    identifier: FullName
  entityType: Account
- fieldMappings:
  - columnName: IPCustomEntity
    identifier: Address
  entityType: IP
kind: Scheduled
queryPeriod: 1h
severity: Medium
query: |
  (union isfuzzy=true
  (AuditLogs
  | where OperationName =~ "Disable Strong Authentication"
  | extend IPAddress = tostring(parse_json(tostring(InitiatedBy.user)).ipAddress)
  | extend InitiatedByUser = iff(isnotempty(tostring(parse_json(tostring(InitiatedBy.user)).userPrincipalName)),
   tostring(parse_json(tostring(InitiatedBy.user)).userPrincipalName), tostring(parse_json(tostring(InitiatedBy.app)).displayName))
  | extend Targetprop = todynamic(TargetResources)
  | extend TargetUser = tostring(Targetprop[0].userPrincipalName)
  | summarize StartTimeUtc = min(TimeGenerated), EndTimeUtc = max(TimeGenerated) by User = TargetUser, InitiatedByUser , Operation = OperationName , CorrelationId, IPAddress, Category, Source = SourceSystem , AADTenantId, Type
  ),
  (AWSCloudTrail
  | where EventName in~ ("DeactivateMFADevice", "DeleteVirtualMFADevice")
  | extend InstanceProfileName = tostring(parse_json(RequestParameters).InstanceProfileName)
  | extend TargetUser = tostring(parse_json(RequestParameters).userName)
  | summarize StartTimeUtc = min(TimeGenerated), EndTimeUtc = max(TimeGenerated) by User = TargetUser, Source = EventSource , Operation = EventName , TenantorInstance_Detail = InstanceProfileName, IPAddress = SourceIpAddress
  )
  )
  | extend timestamp = StartTimeUtc, AccountCustomEntity = User, IPCustomEntity = IPAddress  
triggerOperator: gt
id: 65c78944-930b-4cae-bd79-c3664ae30ba7
description: |
    'Multi-Factor Authentication (MFA) helps prevent credential compromise. This alert identifies when an attempt has been made to disable MFA for a user '
triggerThreshold: 0
name: MFA disabled for a user
relevantTechniques:
- T1098
- T1556
tactics:
- CredentialAccess
- Persistence
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cloud Identity Threat Protection Essentials/Analytic Rules/MFADisable.yaml

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/65c78944-930b-4cae-bd79-c3664ae30ba7')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/65c78944-930b-4cae-bd79-c3664ae30ba7')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01",
      "properties": {
        "displayName": "MFA disabled for a user",
        "description": "'Multi-Factor Authentication (MFA) helps prevent credential compromise. This alert identifies when an attempt has been made to disable MFA for a user '\n",
        "severity": "Medium",
        "enabled": true,
        "query": "(union isfuzzy=true\n(AuditLogs\n| where OperationName =~ \"Disable Strong Authentication\"\n| extend IPAddress = tostring(parse_json(tostring(InitiatedBy.user)).ipAddress)\n| extend InitiatedByUser = iff(isnotempty(tostring(parse_json(tostring(InitiatedBy.user)).userPrincipalName)),\n tostring(parse_json(tostring(InitiatedBy.user)).userPrincipalName), tostring(parse_json(tostring(InitiatedBy.app)).displayName))\n| extend Targetprop = todynamic(TargetResources)\n| extend TargetUser = tostring(Targetprop[0].userPrincipalName)\n| summarize StartTimeUtc = min(TimeGenerated), EndTimeUtc = max(TimeGenerated) by User = TargetUser, InitiatedByUser , Operation = OperationName , CorrelationId, IPAddress, Category, Source = SourceSystem , AADTenantId, Type\n),\n(AWSCloudTrail\n| where EventName in~ (\"DeactivateMFADevice\", \"DeleteVirtualMFADevice\")\n| extend InstanceProfileName = tostring(parse_json(RequestParameters).InstanceProfileName)\n| extend TargetUser = tostring(parse_json(RequestParameters).userName)\n| summarize StartTimeUtc = min(TimeGenerated), EndTimeUtc = max(TimeGenerated) by User = TargetUser, Source = EventSource , Operation = EventName , TenantorInstance_Detail = InstanceProfileName, IPAddress = SourceIpAddress\n)\n)\n| extend timestamp = StartTimeUtc, AccountCustomEntity = User, IPCustomEntity = IPAddress\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CredentialAccess",
          "Persistence"
        ],
        "techniques": [
          "T1098",
          "T1556"
        ],
        "alertRuleTemplateName": "65c78944-930b-4cae-bd79-c3664ae30ba7",
        "customDetails": null,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "identifier": "FullName",
                "columnName": "AccountCustomEntity"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "identifier": "Address",
                "columnName": "IPCustomEntity"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cloud Identity Threat Protection Essentials/Analytic Rules/MFADisable.yaml",
        "templateVersion": "1.0.3"
      }
    }
  ]
}