Mimecast Targeted Threat Protection - Impersonation Protect

MimecastTTPImpersonation
| where ['Tagged Malicious'] == true
| extend SenderAddress = ['Sender Address'],
  SenderIPAddress = ['Sender IP Address'],
  RecipientAddress = ['Recipient Address']

relevantTechniques:
- T1114
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    lookbackDuration: P7D
    enabled: true
    reopenClosedIncident: false
    matchingMethod: AllEntities
name: Mimecast Targeted Threat Protection - Impersonation Protect
requiredDataConnectors:
- dataTypes:
  - MimecastTTPImpersonation
  connectorId: MimecastTTPAPI
entityMappings:
- fieldMappings:
  - identifier: Sender
    columnName: SenderAddress
  - identifier: SenderIP
    columnName: SenderIPAddress
  - identifier: Recipient
    columnName: RecipientAddress
  entityType: MailMessage
triggerThreshold: 0
id: c048fa06-0d50-4626-ae82-a6cea812d9c4
tactics:
- Exfiltration
- Collection
- Discovery
version: 1.0.0
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Mimecast/Analytic Rules/MimecastTTP/Mimecast_TTP_Impersonation.yaml
queryPeriod: 30m
kind: Scheduled
eventGroupingSettings:
  aggregationKind: AlertPerResult
suppressionDuration: 5h
queryFrequency: 30m
severity: High
status: Available
suppressionEnabled: false
description: |
    'Detects a maliciously tagged impersonation.'
query: |
  MimecastTTPImpersonation
  | where ['Tagged Malicious'] == true
  | extend SenderAddress = ['Sender Address'],
    SenderIPAddress = ['Sender IP Address'],
    RecipientAddress = ['Recipient Address']  
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/c048fa06-0d50-4626-ae82-a6cea812d9c4')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/c048fa06-0d50-4626-ae82-a6cea812d9c4')]",
      "properties": {
        "alertRuleTemplateName": "c048fa06-0d50-4626-ae82-a6cea812d9c4",
        "customDetails": null,
        "description": "'Detects a maliciously tagged impersonation.'\n",
        "displayName": "Mimecast Targeted Threat Protection - Impersonation Protect",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "MailMessage",
            "fieldMappings": [
              {
                "columnName": "SenderAddress",
                "identifier": "Sender"
              },
              {
                "columnName": "SenderIPAddress",
                "identifier": "SenderIP"
              },
              {
                "columnName": "RecipientAddress",
                "identifier": "Recipient"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "AlertPerResult"
        },
        "incidentConfiguration": {
          "createIncident": true,
          "groupingConfiguration": {
            "enabled": true,
            "lookbackDuration": "P7D",
            "matchingMethod": "AllEntities",
            "reopenClosedIncident": false
          }
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Mimecast/Analytic Rules/MimecastTTP/Mimecast_TTP_Impersonation.yaml",
        "query": "MimecastTTPImpersonation\n| where ['Tagged Malicious'] == true\n| extend SenderAddress = ['Sender Address'],\n  SenderIPAddress = ['Sender IP Address'],\n  RecipientAddress = ['Recipient Address']\n",
        "queryFrequency": "PT30M",
        "queryPeriod": "PT30M",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT5H",
        "suppressionEnabled": false,
        "tactics": [
          "Collection",
          "Discovery",
          "Exfiltration"
        ],
        "techniques": [
          "T1114"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}