Mimecast Secure Email Gateway - Impersonation Protect

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Id	2ef77cef-439f-4d94-848f-3eca67510d2f
Rulename	Mimecast Secure Email Gateway - Impersonation Protect
Description	Detects threats from impersonation mail under targeted threat protection.
Severity	High
Tactics	Discovery LateralMovement Collection
Techniques	T1114
Required data connectors	MimecastSEGAPI
Kind	Scheduled
Query frequency	15m
Query period	15m
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Mimecast/Analytic Rules/MimecastSEG/MimecastCG_Impersonation.yaml
Version	1.0.0
Arm template	2ef77cef-439f-4d94-848f-3eca67510d2f.json

KQL

MimecastCG
| where Type == "email_ttp_impersonation"
| extend  SenderEnvelope = ['Sender Envelope'] , SenderIp = ['Sender IP']

YAML

eventGroupingSettings:
  aggregationKind: AlertPerResult
triggerThreshold: 0
entityMappings:
- entityType: MailMessage
  fieldMappings:
  - identifier: Sender
    columnName: SenderEnvelope
  - identifier: SenderIP
    columnName: SenderIp
  - identifier: Recipient
    columnName: Recipients
requiredDataConnectors:
- dataTypes:
  - MimecastCG
  connectorId: MimecastSEGAPI
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Mimecast/Analytic Rules/MimecastSEG/MimecastCG_Impersonation.yaml
enabled: true
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    enabled: true
    reopenClosedIncident: false
    matchingMethod: AllEntities
    lookbackDuration: P7D
version: 1.0.0
name: Mimecast Secure Email Gateway - Impersonation Protect
relevantTechniques:
- T1114
status: Available
suppressionEnabled: false
queryPeriod: 15m
kind: Scheduled
id: 2ef77cef-439f-4d94-848f-3eca67510d2f
query: |
  MimecastCG
  | where Type == "email_ttp_impersonation"
  | extend  SenderEnvelope = ['Sender Envelope'] , SenderIp = ['Sender IP']  
description: |
    'Detects threats from impersonation mail under targeted threat protection.'
queryFrequency: 15m
severity: High
triggerOperator: gt
tactics:
- Discovery
- LateralMovement
- Collection
suppressionDuration: 5h

ARM