Mimecast Secure Email Gateway - URL Protect
Id | ea19dae6-bbb3-4444-a1b8-8e9ae6064aab |
Rulename | Mimecast Secure Email Gateway - URL Protect |
Description | Detect threat when potentially malicious url found |
Severity | High |
Tactics | InitialAccess Discovery Execution |
Techniques | T1566 |
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_Url_Protect.yaml |
Version | 1.0.0 |
Arm template | ea19dae6-bbb3-4444-a1b8-8e9ae6064aab.json |
MimecastSIEM_CL| where mimecastEventId_s=="mail_ttp_url" and reason_s != "clean"
customDetails:
msgid: msgid_s
urlCategory: urlCategory_s
reason: reason_s
action: action_s
url: url_s
credentialTheft: credentialTheft_s
senderDomain: senderDomain_s
route: route_s
SourceIP: SourceIP
id: ea19dae6-bbb3-4444-a1b8-8e9ae6064aab
suppressionDuration: 5h
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/MimecastSEG/Analytic Rules/MimecastSIEM_Url_Protect.yaml
requiredDataConnectors:
- dataTypes:
- MimecastSIEM_CL
connectorId: MimecastSIEMAPI
description: Detect threat when potentially malicious url found
severity: High
queryPeriod: 15m
kind: Scheduled
tactics:
- InitialAccess
- Discovery
- Execution
eventGroupingSettings:
aggregationKind: SingleAlert
queryFrequency: 5m
query: MimecastSIEM_CL| where mimecastEventId_s=="mail_ttp_url" and reason_s != "clean"
enabled: true
version: 1.0.0
triggerThreshold: 0
entityMappings:
- entityType: MailMessage
fieldMappings:
- columnName: sender_s
identifier: Sender
- columnName: recipient_s
identifier: Recipient
- columnName: subject_s
identifier: Subject
name: Mimecast Secure Email Gateway - URL Protect
relevantTechniques:
- T1566
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/ea19dae6-bbb3-4444-a1b8-8e9ae6064aab')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/ea19dae6-bbb3-4444-a1b8-8e9ae6064aab')]",
"properties": {
"alertRuleTemplateName": "ea19dae6-bbb3-4444-a1b8-8e9ae6064aab",
"customDetails": {
"action": "action_s",
"credentialTheft": "credentialTheft_s",
"msgid": "msgid_s",
"reason": "reason_s",
"route": "route_s",
"senderDomain": "senderDomain_s",
"SourceIP": "SourceIP",
"url": "url_s",
"urlCategory": "urlCategory_s"
},
"description": "Detect threat when potentially malicious url found",
"displayName": "Mimecast Secure Email Gateway - URL Protect",
"enabled": true,
"entityMappings": [
{
"entityType": "MailMessage",
"fieldMappings": [
{
"columnName": "sender_s",
"identifier": "Sender"
},
{
"columnName": "recipient_s",
"identifier": "Recipient"
},
{
"columnName": "subject_s",
"identifier": "Subject"
}
]
}
],
"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_Url_Protect.yaml",
"query": "MimecastSIEM_CL| where mimecastEventId_s==\"mail_ttp_url\" and reason_s != \"clean\"",
"queryFrequency": "PT5M",
"queryPeriod": "PT15M",
"severity": "High",
"subTechniques": [],
"suppressionDuration": "PT5H",
"suppressionEnabled": false,
"tactics": [
"Discovery",
"Execution",
"InitialAccess"
],
"techniques": [
"T1566"
],
"templateVersion": "1.0.0",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}