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