vArmour AppController - SMB Realm Traversal

CommonSecurityLog
| where DeviceVendor == "vArmour"
| where DeviceProduct == "AC"
| where Activity == "POLICY_VIOLATION"
| extend PolicyName = extract("(SMB_REALM_TRAVERSAL\\w+{.*})", 1, DeviceCustomString1)

relevantTechniques:
- T1135
- T1570
name: vArmour AppController - SMB Realm Traversal
requiredDataConnectors:
- dataTypes:
  - CommonSecurityLog
  connectorId: vArmourAC
- dataTypes:
  - CommonSecurityLog
  connectorId: vArmourACAma
- dataTypes:
  - CommonSecurityLog
  connectorId: CefAma
entityMappings:
- fieldMappings:
  - identifier: HostName
    columnName: DestinationHostName
  entityType: Host
- fieldMappings:
  - identifier: Address
    columnName: SourceIP
  entityType: IP
triggerThreshold: 0
id: a36de6c3-3198-4d37-92ae-e19e36712c2e
tactics:
- Discovery
- LateralMovement
version: 1.0.2
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/vArmour Application Controller/Analytic Rules/vArmourApplicationControllerSMBRealmTraversal.yaml
queryPeriod: 1h
kind: Scheduled
queryFrequency: 1h
severity: Medium
status: Available
description: |
    'Detects when SMB traffic crosses Production and Non-Production Realms. Possible network share discovery or lateral tool transfer across realms'
query: |
  CommonSecurityLog
  | where DeviceVendor == "vArmour"
  | where DeviceProduct == "AC"
  | where Activity == "POLICY_VIOLATION"
  | extend PolicyName = extract("(SMB_REALM_TRAVERSAL\\w+{.*})", 1, DeviceCustomString1)  
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/a36de6c3-3198-4d37-92ae-e19e36712c2e')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/a36de6c3-3198-4d37-92ae-e19e36712c2e')]",
      "properties": {
        "alertRuleTemplateName": "a36de6c3-3198-4d37-92ae-e19e36712c2e",
        "customDetails": null,
        "description": "'Detects when SMB traffic crosses Production and Non-Production Realms. Possible network share discovery or lateral tool transfer across realms'\n",
        "displayName": "vArmour AppController - SMB Realm Traversal",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "DestinationHostName",
                "identifier": "HostName"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "SourceIP",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/vArmour Application Controller/Analytic Rules/vArmourApplicationControllerSMBRealmTraversal.yaml",
        "query": "CommonSecurityLog\n| where DeviceVendor == \"vArmour\"\n| where DeviceProduct == \"AC\"\n| where Activity == \"POLICY_VIOLATION\"\n| extend PolicyName = extract(\"(SMB_REALM_TRAVERSAL\\\\w+{.*})\", 1, DeviceCustomString1)\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Discovery",
          "LateralMovement"
        ],
        "techniques": [
          "T1135",
          "T1570"
        ],
        "templateVersion": "1.0.2",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}