Microsoft Sentinel Analytic Rules
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Claroty - Multiple failed logins by user

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Id4b5bb3fc-c690-4f54-9a74-016213d699b4
RulenameClaroty - Multiple failed logins by user
DescriptionDetects multiple failed logins by same user.
SeverityHigh
TacticsInitialAccess
TechniquesT1190
T1133
Required data connectorsClaroty
ClarotyAma
KindScheduled
Query frequency1h
Query period1h
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Claroty/Analytic Rules/ClarotyMultipleFailedLogin.yaml
Version1.0.1
Arm template4b5bb3fc-c690-4f54-9a74-016213d699b4.json
Deploy To Azure
let threshold = 5;
ClarotyEvent
| where EventType has 'Login to SRA'
| where EventType !has 'succeeded'
| extend SrcUsername = extract(@'User\s(.*?)\sfailed', 1, EventMessage)
| summarize count() by SrcUsername, bin(TimeGenerated, 5m)
| where count_ > threshold
| extend AccountCustomEntity = SrcUsername
relevantTechniques:
- T1190
- T1133
queryPeriod: 1h
tactics:
- InitialAccess
requiredDataConnectors:
- dataTypes:
  - ClarotyEvent
  connectorId: Claroty
- dataTypes:
  - ClarotyEvent
  connectorId: ClarotyAma
triggerThreshold: 0
entityMappings:
- fieldMappings:
  - identifier: Name
    columnName: AccountCustomEntity
  entityType: Account
name: Claroty - Multiple failed logins by user
status: Available
query: |
  let threshold = 5;
  ClarotyEvent
  | where EventType has 'Login to SRA'
  | where EventType !has 'succeeded'
  | extend SrcUsername = extract(@'User\s(.*?)\sfailed', 1, EventMessage)
  | summarize count() by SrcUsername, bin(TimeGenerated, 5m)
  | where count_ > threshold
  | extend AccountCustomEntity = SrcUsername  
queryFrequency: 1h
id: 4b5bb3fc-c690-4f54-9a74-016213d699b4
severity: High
description: |
    'Detects multiple failed logins by same user.'
version: 1.0.1
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Claroty/Analytic Rules/ClarotyMultipleFailedLogin.yaml
kind: Scheduled
triggerOperator: gt
{
  "$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/4b5bb3fc-c690-4f54-9a74-016213d699b4')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/4b5bb3fc-c690-4f54-9a74-016213d699b4')]",
      "properties": {
        "alertRuleTemplateName": "4b5bb3fc-c690-4f54-9a74-016213d699b4",
        "customDetails": null,
        "description": "'Detects multiple failed logins by same user.'\n",
        "displayName": "Claroty - Multiple failed logins by user",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountCustomEntity",
                "identifier": "Name"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Claroty/Analytic Rules/ClarotyMultipleFailedLogin.yaml",
        "query": "let threshold = 5;\nClarotyEvent\n| where EventType has 'Login to SRA'\n| where EventType !has 'succeeded'\n| extend SrcUsername = extract(@'User\\s(.*?)\\sfailed', 1, EventMessage)\n| summarize count() by SrcUsername, bin(TimeGenerated, 5m)\n| where count_ > threshold\n| extend AccountCustomEntity = SrcUsername\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "High",
        "status": "Available",
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess"
        ],
        "techniques": [
          "T1133",
          "T1190"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}