Failed sign-ins into LastPass due to MFA

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Id	760b8467-e6cc-4006-9149-5696845c1a54
Rulename	Failed sign-ins into LastPass due to MFA
Description	This rule will check if a sign-in failed into LastPass due to MFA. An incident can indicate the potential brute forcing of a LastPass account. The use of MFA is identified by combining the sign-in logs, this rule assumes LastPass is federated to Entra ID.
Severity	Low
Tactics	InitialAccess
Techniques	T1078 T1190
Required data connectors	AzureActiveDirectory LastPass
Kind	Scheduled
Query frequency	1d
Query period	1d
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/LastPass/Analytic Rules/FailedSigninDueToMFA.yaml
Version	1.0.1
Arm template	760b8467-e6cc-4006-9149-5696845c1a54.json

KQL

LastPassNativePoller_CL
| where Action_s == "Log in"
| join (SigninLogs | where AppDisplayName == "LastPass Enterprise") on $left.IP_Address_s == $right.IPAddress and $left.Username_s == $right.UserPrincipalName
| where ResultType in (50074, 50076)
| extend AccountCustomEntity = Username_s, IPCustomEntity = IP_Address_s

YAML

status: Available
queryFrequency: 1d
description: |
  'This rule will check if a sign-in failed into LastPass due to MFA.
  An incident can indicate the potential brute forcing of a LastPass account. 
  The use of MFA is identified by combining the sign-in logs, this rule assumes LastPass is federated to Entra ID.'  
severity: Low
version: 1.0.1
relevantTechniques:
- T1078
- T1190
kind: Scheduled
name: Failed sign-ins into LastPass due to MFA
triggerThreshold: 0
eventGroupingSettings:
  aggregationKind: AlertPerResult
query: |
  LastPassNativePoller_CL
  | where Action_s == "Log in"
  | join (SigninLogs | where AppDisplayName == "LastPass Enterprise") on $left.IP_Address_s == $right.IPAddress and $left.Username_s == $right.UserPrincipalName
  | where ResultType in (50074, 50076)
  | extend AccountCustomEntity = Username_s, IPCustomEntity = IP_Address_s  
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/LastPass/Analytic Rules/FailedSigninDueToMFA.yaml
requiredDataConnectors:
- connectorId: LastPass
  dataTypes:
  - LastPassNativePoller_CL
- connectorId: AzureActiveDirectory
  dataTypes:
  - SigninLogs
tactics:
- InitialAccess
id: 760b8467-e6cc-4006-9149-5696845c1a54
queryPeriod: 1d
entityMappings:
- fieldMappings:
  - columnName: AccountCustomEntity
    identifier: Name
  entityType: Account
- fieldMappings:
  - columnName: IPCustomEntity
    identifier: Address
  entityType: IP

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/760b8467-e6cc-4006-9149-5696845c1a54')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/760b8467-e6cc-4006-9149-5696845c1a54')]",
      "properties": {
        "alertRuleTemplateName": "760b8467-e6cc-4006-9149-5696845c1a54",
        "customDetails": null,
        "description": "'This rule will check if a sign-in failed into LastPass due to MFA.\nAn incident can indicate the potential brute forcing of a LastPass account. \nThe use of MFA is identified by combining the sign-in logs, this rule assumes LastPass is federated to Entra ID.'\n",
        "displayName": "Failed sign-ins into LastPass due to MFA",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountCustomEntity",
                "identifier": "Name"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IPCustomEntity",
                "identifier": "Address"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "AlertPerResult"
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/LastPass/Analytic Rules/FailedSigninDueToMFA.yaml",
        "query": "LastPassNativePoller_CL\n| where Action_s == \"Log in\"\n| join (SigninLogs | where AppDisplayName == \"LastPass Enterprise\") on $left.IP_Address_s == $right.IPAddress and $left.Username_s == $right.UserPrincipalName\n| where ResultType in (50074, 50076)\n| extend AccountCustomEntity = Username_s, IPCustomEntity = IP_Address_s\n",
        "queryFrequency": "P1D",
        "queryPeriod": "P1D",
        "severity": "Low",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess"
        ],
        "techniques": [
          "T1078",
          "T1190"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}