Mimecast Secure Email Gateway - Internal Email Protect
Id | 5b66d176-e344-4abf-b915-e5f09a6430ef |
Rulename | Mimecast Secure Email Gateway - Internal Email Protect |
Description | Detects threats from internal email threat protection |
Severity | High |
Tactics | LateralMovement Persistence Exfiltration |
Techniques | T1534 T1546 |
Required data connectors | MimecastSIEMAPI |
Kind | Scheduled |
Query frequency | 5m |
Query period | 15m |
Trigger threshold | 0 |
Trigger operator | gt |
Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/MimecastSEG/Analytic Rules/MimecastSIEM_Internal_Mail_Protect.yaml |
Version | 1.0.0 |
Arm template | 5b66d176-e344-4abf-b915-e5f09a6430ef.json |
MimecastSIEM_CL| where mimecastEventId_s=="mail_ttp_iep"
customDetails:
UrlCategory: UrlCategory_s
ScanResultInfo: ScanResultInfo_s
Route: Route_s
Subject: Subject_s
id: 5b66d176-e344-4abf-b915-e5f09a6430ef
suppressionDuration: 5h
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/MimecastSEG/Analytic Rules/MimecastSIEM_Internal_Mail_Protect.yaml
requiredDataConnectors:
- dataTypes:
- MimecastSIEM_CL
connectorId: MimecastSIEMAPI
description: Detects threats from internal email threat protection
severity: High
queryPeriod: 15m
kind: Scheduled
tactics:
- LateralMovement
- Persistence
- Exfiltration
eventGroupingSettings:
aggregationKind: SingleAlert
queryFrequency: 5m
query: MimecastSIEM_CL| where mimecastEventId_s=="mail_ttp_iep"
enabled: true
version: 1.0.0
triggerThreshold: 0
entityMappings:
- entityType: MailMessage
fieldMappings:
- columnName: Sender_s
identifier: Sender
- columnName: Recipient_s
identifier: Recipient
- columnName: MsgId_s
identifier: InternetMessageId
- entityType: URL
fieldMappings:
- columnName: URL_s
identifier: Url
name: Mimecast Secure Email Gateway - Internal Email Protect
relevantTechniques:
- T1534
- T1546
incidentConfiguration:
groupingConfiguration:
lookbackDuration: 1d
reopenClosedIncident: false
matchingMethod: AllEntities
enabled: true
createIncident: true
suppressionEnabled: false
{
"$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/5b66d176-e344-4abf-b915-e5f09a6430ef')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/5b66d176-e344-4abf-b915-e5f09a6430ef')]",
"properties": {
"alertRuleTemplateName": "5b66d176-e344-4abf-b915-e5f09a6430ef",
"customDetails": {
"Route": "Route_s",
"ScanResultInfo": "ScanResultInfo_s",
"Subject": "Subject_s",
"UrlCategory": "UrlCategory_s"
},
"description": "Detects threats from internal email threat protection",
"displayName": "Mimecast Secure Email Gateway - Internal Email Protect",
"enabled": true,
"entityMappings": [
{
"entityType": "MailMessage",
"fieldMappings": [
{
"columnName": "Sender_s",
"identifier": "Sender"
},
{
"columnName": "Recipient_s",
"identifier": "Recipient"
},
{
"columnName": "MsgId_s",
"identifier": "InternetMessageId"
}
]
},
{
"entityType": "URL",
"fieldMappings": [
{
"columnName": "URL_s",
"identifier": "Url"
}
]
}
],
"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/MimecastSIEM_Internal_Mail_Protect.yaml",
"query": "MimecastSIEM_CL| where mimecastEventId_s==\"mail_ttp_iep\"",
"queryFrequency": "PT5M",
"queryPeriod": "PT15M",
"severity": "High",
"subTechniques": [],
"suppressionDuration": "PT5H",
"suppressionEnabled": false,
"tactics": [
"Exfiltration",
"LateralMovement",
"Persistence"
],
"techniques": [
"T1534",
"T1546"
],
"templateVersion": "1.0.0",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}