Microsoft Sentinel Analytic Rules
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Mimecast Data Leak Prevention - Hold

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Id3e12b7b1-75e5-497c-ba01-b6cb30b60d7f
RulenameMimecast Data Leak Prevention - Hold
DescriptionDetects threat for data leak when action is hold
SeverityInformational
TacticsExfiltration
TechniquesT1030
Required data connectorsMimecastSIEMAPI
KindScheduled
Query frequency5m
Query period15m
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/MimecastSEG/Analytic Rules/MimecastDLP_Hold.yaml
Version1.0.0
Arm template3e12b7b1-75e5-497c-ba01-b6cb30b60d7f.json
Deploy To Azure
MimecastDLP_CL| where action_s == "hold";
queryFrequency: 5m
severity: Informational
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/MimecastSEG/Analytic Rules/MimecastDLP_Hold.yaml
id: 3e12b7b1-75e5-497c-ba01-b6cb30b60d7f
name: Mimecast Data Leak Prevention - Hold
query: MimecastDLP_CL| where action_s == "hold";
entityMappings:
- fieldMappings:
  - columnName: senderAddress_s
    identifier: Sender
  - columnName: recipientAddress_s
    identifier: Recipient
  - columnName: action_s
    identifier: DeliveryAction
  entityType: MailMessage
queryPeriod: 15m
triggerThreshold: 0
eventGroupingSettings:
  aggregationKind: SingleAlert
tactics:
- Exfiltration
version: 1.0.0
kind: Scheduled
relevantTechniques:
- T1030
suppressionEnabled: false
suppressionDuration: 5h
requiredDataConnectors:
- dataTypes:
  - MimecastDLP_CL
  connectorId: MimecastSIEMAPI
description: Detects threat for data leak when action is hold
incidentConfiguration:
  groupingConfiguration:
    enabled: true
    matchingMethod: AllEntities
    lookbackDuration: 1d
    reopenClosedIncident: false
  createIncident: true
enabled: true
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": "2023-02-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/3e12b7b1-75e5-497c-ba01-b6cb30b60d7f')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/3e12b7b1-75e5-497c-ba01-b6cb30b60d7f')]",
      "properties": {
        "alertRuleTemplateName": "3e12b7b1-75e5-497c-ba01-b6cb30b60d7f",
        "customDetails": null,
        "description": "Detects threat for data leak when action is hold",
        "displayName": "Mimecast Data Leak Prevention - Hold",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "MailMessage",
            "fieldMappings": [
              {
                "columnName": "senderAddress_s",
                "identifier": "Sender"
              },
              {
                "columnName": "recipientAddress_s",
                "identifier": "Recipient"
              },
              {
                "columnName": "action_s",
                "identifier": "DeliveryAction"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "SingleAlert"
        },
        "incidentConfiguration": {
          "createIncident": true,
          "groupingConfiguration": {
            "enabled": true,
            "lookbackDuration": "P1D",
            "matchingMethod": "AllEntities",
            "reopenClosedIncident": false
          }
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/MimecastSEG/Analytic Rules/MimecastDLP_Hold.yaml",
        "query": "MimecastDLP_CL| where action_s == \"hold\";",
        "queryFrequency": "PT5M",
        "queryPeriod": "PT15M",
        "severity": "Informational",
        "suppressionDuration": "PT5H",
        "suppressionEnabled": false,
        "tactics": [
          "Exfiltration"
        ],
        "techniques": [
          "T1030"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}