Alsid Password Spraying

afad_parser
| where MessageType == 2 and Codename == "Password Spraying"
| extend HostName = tostring(split(Host, '.', 0)[0]), DnsDomain = tostring(strcat_array(array_slice(split(Host, '.'), 1, -1), '.'))

relevantTechniques:
- T1110.003
name: Alsid Password Spraying
requiredDataConnectors:
- dataTypes:
  - AlsidForADLog_CL
  connectorId: AlsidForAD
entityMappings:
- fieldMappings:
  - identifier: HostName
    columnName: HostName
  - identifier: DnsDomain
    columnName: DnsDomain
  entityType: Host
triggerThreshold: 0
id: 9e20eb4e-cc0d-4349-a99d-cad756859dfb
tactics:
- CredentialAccess
version: 1.0.1
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Alsid For AD/Analytic Rules/PasswordSpraying.yaml
queryPeriod: 2h
kind: Scheduled
queryFrequency: 2h
severity: High
status: Available
description: |
    'Searches for Password spraying attacks'
query: |
  afad_parser
  | where MessageType == 2 and Codename == "Password Spraying"
  | extend HostName = tostring(split(Host, '.', 0)[0]), DnsDomain = tostring(strcat_array(array_slice(split(Host, '.'), 1, -1), '.'))  
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": "2024-01-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/9e20eb4e-cc0d-4349-a99d-cad756859dfb')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/9e20eb4e-cc0d-4349-a99d-cad756859dfb')]",
      "properties": {
        "alertRuleTemplateName": "9e20eb4e-cc0d-4349-a99d-cad756859dfb",
        "customDetails": null,
        "description": "'Searches for Password spraying attacks'\n",
        "displayName": "Alsid Password Spraying",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "HostName",
                "identifier": "HostName"
              },
              {
                "columnName": "DnsDomain",
                "identifier": "DnsDomain"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Alsid For AD/Analytic Rules/PasswordSpraying.yaml",
        "query": "afad_parser\n| where MessageType == 2 and Codename == \"Password Spraying\"\n| extend HostName = tostring(split(Host, '.', 0)[0]), DnsDomain = tostring(strcat_array(array_slice(split(Host, '.'), 1, -1), '.'))\n",
        "queryFrequency": "PT2H",
        "queryPeriod": "PT2H",
        "severity": "High",
        "status": "Available",
        "subTechniques": [
          "T1110.003"
        ],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CredentialAccess"
        ],
        "techniques": [
          "T1110"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}