Microsoft Sentinel Analytic Rules
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Silverfort - UserBruteForce Incident

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Id46ff357b-9e98-465b-9e45-cd52fa4a7522
RulenameSilverfort - UserBruteForce Incident
DescriptionA security weakness that allows attackers to gain unauthorized access to user accounts by systematically guessing the username and password combinations.
SeverityHigh
TacticsCredentialAccess
TechniquesT1110
Required data connectorsSilverfortAma
KindScheduled
Query frequency15m
Query period15m
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Silverfort/Analytic Rules/User_Brute_Force.yaml
Version1.0.0
Arm template46ff357b-9e98-465b-9e45-cd52fa4a7522.json
Deploy To Azure
CommonSecurityLog 
| where DeviceVendor has 'Silverfort'
| where DeviceProduct has 'Admin Console'
| where DeviceEventClassID == "NewIncident"
| where Message has "UserBruteForce"
| extend UserName = parse_json(replace('^""|""$', '', Message))['userName']
requiredDataConnectors:
- connectorId: SilverfortAma
  dataTypes:
  - CommonSecurityLog
query: |-
  CommonSecurityLog 
  | where DeviceVendor has 'Silverfort'
  | where DeviceProduct has 'Admin Console'
  | where DeviceEventClassID == "NewIncident"
  | where Message has "UserBruteForce"
  | extend UserName = parse_json(replace('^""|""$', '', Message))['userName']  
description: |
    'A security weakness that allows attackers to gain unauthorized access to user accounts by systematically guessing the username and password combinations.'
kind: Scheduled
name: Silverfort - UserBruteForce Incident
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Silverfort/Analytic Rules/User_Brute_Force.yaml
relevantTechniques:
- T1110
entityMappings:
- fieldMappings:
  - identifier: Name
    columnName: UserName
  entityType: Account
version: 1.0.0
id: 46ff357b-9e98-465b-9e45-cd52fa4a7522
severity: High
triggerThreshold: 0
tactics:
- CredentialAccess
queryPeriod: 15m
triggerOperator: gt
queryFrequency: 15m
{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2024-01-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/46ff357b-9e98-465b-9e45-cd52fa4a7522')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/46ff357b-9e98-465b-9e45-cd52fa4a7522')]",
      "properties": {
        "alertRuleTemplateName": "46ff357b-9e98-465b-9e45-cd52fa4a7522",
        "customDetails": null,
        "description": "'A security weakness that allows attackers to gain unauthorized access to user accounts by systematically guessing the username and password combinations.'\n",
        "displayName": "Silverfort - UserBruteForce Incident",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "UserName",
                "identifier": "Name"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Silverfort/Analytic Rules/User_Brute_Force.yaml",
        "query": "CommonSecurityLog \n| where DeviceVendor has 'Silverfort'\n| where DeviceProduct has 'Admin Console'\n| where DeviceEventClassID == \"NewIncident\"\n| where Message has \"UserBruteForce\"\n| extend UserName = parse_json(replace('^\"\"|\"\"$', '', Message))['userName']",
        "queryFrequency": "PT15M",
        "queryPeriod": "PT15M",
        "severity": "High",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CredentialAccess"
        ],
        "techniques": [
          "T1110"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}