Mimecast Targeted Threat Protection - Impersonation Protect
Id | d8e7eca6-4b59-4069-a31e-a022b2a12ea4 |
Rulename | Mimecast Targeted Threat Protection - Impersonation Protect |
Description | Detects a maliciously tagged impersonation |
Severity | High |
Tactics | Exfiltration Collection Discovery |
Techniques | T1114 |
Required data connectors | MimecastTTPAPI |
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/MimecastTTP/Analytic Rules/MimecastTTPImpersonation.yaml |
Version | 1.0.0 |
Arm template | d8e7eca6-4b59-4069-a31e-a022b2a12ea4.json |
MimecastTTPImpersonation_CL| where taggedMalicious_b == true;
incidentConfiguration:
createIncident: true
groupingConfiguration:
reopenClosedIncident: false
enabled: true
lookbackDuration: 1d
matchingMethod: AllEntities
relevantTechniques:
- T1114
description: Detects a maliciously tagged impersonation
queryPeriod: 15m
suppressionDuration: 5h
queryFrequency: 5m
enabled: true
tactics:
- Exfiltration
- Collection
- Discovery
name: Mimecast Targeted Threat Protection - Impersonation Protect
alertRuleTemplateName:
requiredDataConnectors:
- connectorId: MimecastTTPAPI
dataTypes:
- MimecastTTPImpersonation_CL
entityMappings:
- entityType: MailMessage
fieldMappings:
- identifier: Sender
columnName: senderAddress_s
- identifier: SenderIP
columnName: senderIpAddress_s
- identifier: Recipient
columnName: recipientAddress_s
triggerThreshold: 0
version: 1.0.0
id: d8e7eca6-4b59-4069-a31e-a022b2a12ea4
query: MimecastTTPImpersonation_CL| where taggedMalicious_b == true;
kind: Scheduled
suppressionEnabled: false
eventGroupingSettings:
aggregationKind: AlertPerResult
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/MimecastTTP/Analytic Rules/MimecastTTPImpersonation.yaml
severity: High
{
"$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/d8e7eca6-4b59-4069-a31e-a022b2a12ea4')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/d8e7eca6-4b59-4069-a31e-a022b2a12ea4')]",
"properties": {
"alertRuleTemplateName": "d8e7eca6-4b59-4069-a31e-a022b2a12ea4",
"customDetails": null,
"description": "Detects a maliciously tagged impersonation",
"displayName": "Mimecast Targeted Threat Protection - Impersonation Protect",
"enabled": true,
"entityMappings": [
{
"entityType": "MailMessage",
"fieldMappings": [
{
"columnName": "senderAddress_s",
"identifier": "Sender"
},
{
"columnName": "senderIpAddress_s",
"identifier": "SenderIP"
},
{
"columnName": "recipientAddress_s",
"identifier": "Recipient"
}
]
}
],
"eventGroupingSettings": {
"aggregationKind": "AlertPerResult"
},
"incidentConfiguration": {
"createIncident": true,
"groupingConfiguration": {
"enabled": true,
"lookbackDuration": "P1D",
"matchingMethod": "AllEntities",
"reopenClosedIncident": false
}
},
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/MimecastTTP/Analytic Rules/MimecastTTPImpersonation.yaml",
"query": "MimecastTTPImpersonation_CL| where taggedMalicious_b == true;",
"queryFrequency": "PT5M",
"queryPeriod": "PT15M",
"severity": "High",
"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"
}
]
}