Votiro - File Blocked in Email

let Votiro_view  = view () { VotiroEvents | where sanitizationResult has "Blocked" and passwordProtected == "false" and from =~ "null" | extend FileWithEmailDetails = strcat_delim(' ', fileName, 'with the hash', SrcFileSHA256, 'was blocked in an email that was sent from user', from, 'to the following recipients', recipients) | summarize count() by fileName, SrcFileSHA256, FileWithEmailDetails, policyName, tostring(incidentURL), sanitizationResult, LogSeverity | extend FileHashAlgo = "SHA256", FileHashValue = SrcFileSHA256};Votiro_view

severity: Low
name: Votiro - File Blocked in Email
incidentConfiguration:
  createIncident: true
requiredDataConnectors:
- dataTypes:
  - CommonSecurityLog
  connectorId: Votiro
alertDetailsOverride:
  alertSeverityColumnName: LogSeverity
  alertTacticsColumnName: sanitizationResult
  alertDescriptionFormat: Attachment {{FileWithEmailDetails}} by Votiro due to Policy rules, see more detail in the following link {{incidentURL}}
  alertDisplayNameFormat: File with hash {{SrcFileSHA256}} was blocked
id: 0b8b91de-c63e-4bc2-b5f4-b15d3b379ec9
tactics:
- CommandAndControl
- DefenseEvasion
- Impact
- InitialAccess
queryFrequency: 10m
eventGroupingSettings:
  aggregationKind: AlertPerResult
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Votiro/Analytic Rules/VotiroFileBlockedInEmail.yaml
description: |
    'The analytic rule is designed to identify when an email is blocked by Votiro Sanitization Engine policy. The rule generates an alert when an email is blocked after Sanitization process which is not password protected and has a from field meaning its a valid email. More information in terms of details about the blocked attachment, such as the file name and hash, and information about the email, such as the sender and recipient(s). The alert also includes information about the Votiro policy that blocked the attachment and provides a link to additional details about the incident.'
triggerThreshold: 0
kind: Scheduled
relevantTechniques:
- T0885
- T1036
- T1027
- T1486
- T1566
query: let Votiro_view  = view () { VotiroEvents | where sanitizationResult has "Blocked" and passwordProtected == "false" and from =~ "null" | extend FileWithEmailDetails = strcat_delim(' ', fileName, 'with the hash', SrcFileSHA256, 'was blocked in an email that was sent from user', from, 'to the following recipients', recipients) | summarize count() by fileName, SrcFileSHA256, FileWithEmailDetails, policyName, tostring(incidentURL), sanitizationResult, LogSeverity | extend FileHashAlgo = "SHA256", FileHashValue = SrcFileSHA256};Votiro_view
entityMappings:
- entityType: FileHash
  fieldMappings:
  - columnName: FileHashAlgo
    identifier: Algorithm
  - columnName: FileHashValue
    identifier: Value
version: 1.0.0
queryPeriod: 10m

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/0b8b91de-c63e-4bc2-b5f4-b15d3b379ec9')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/0b8b91de-c63e-4bc2-b5f4-b15d3b379ec9')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01-preview",
      "properties": {
        "displayName": "Votiro - File Blocked in Email",
        "description": "'The analytic rule is designed to identify when an email is blocked by Votiro Sanitization Engine policy. The rule generates an alert when an email is blocked after Sanitization process which is not password protected and has a from field meaning its a valid email. More information in terms of details about the blocked attachment, such as the file name and hash, and information about the email, such as the sender and recipient(s). The alert also includes information about the Votiro policy that blocked the attachment and provides a link to additional details about the incident.'\n",
        "severity": "Low",
        "enabled": true,
        "query": "let Votiro_view  = view () { VotiroEvents | where sanitizationResult has \"Blocked\" and passwordProtected == \"false\" and from =~ \"null\" | extend FileWithEmailDetails = strcat_delim(' ', fileName, 'with the hash', SrcFileSHA256, 'was blocked in an email that was sent from user', from, 'to the following recipients', recipients) | summarize count() by fileName, SrcFileSHA256, FileWithEmailDetails, policyName, tostring(incidentURL), sanitizationResult, LogSeverity | extend FileHashAlgo = \"SHA256\", FileHashValue = SrcFileSHA256};Votiro_view",
        "queryFrequency": "PT10M",
        "queryPeriod": "PT10M",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CommandAndControl",
          "DefenseEvasion",
          "Impact",
          "InitialAccess"
        ],
        "techniques": [
          "T0885",
          "T1036",
          "T1027",
          "T1486",
          "T1566"
        ],
        "alertRuleTemplateName": "0b8b91de-c63e-4bc2-b5f4-b15d3b379ec9",
        "incidentConfiguration": {
          "createIncident": true
        },
        "eventGroupingSettings": {
          "aggregationKind": "AlertPerResult"
        },
        "alertDetailsOverride": {
          "alertSeverityColumnName": "LogSeverity",
          "alertTacticsColumnName": "sanitizationResult",
          "alertDescriptionFormat": "Attachment {{FileWithEmailDetails}} by Votiro due to Policy rules, see more detail in the following link {{incidentURL}}",
          "alertDisplayNameFormat": "File with hash {{SrcFileSHA256}} was blocked"
        },
        "customDetails": null,
        "entityMappings": [
          {
            "fieldMappings": [
              {
                "identifier": "Algorithm",
                "columnName": "FileHashAlgo"
              },
              {
                "identifier": "Value",
                "columnName": "FileHashValue"
              }
            ],
            "entityType": "FileHash"
          }
        ],
        "templateVersion": "1.0.0",
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Votiro/Analytic Rules/VotiroFileBlockedInEmail.yaml"
      }
    }
  ]
}