Mimecast Targeted Threat Protection - Impersonation Protect

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Id	c048fa06-0d50-4626-ae82-a6cea812d9c4
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	30m
Query period	30m
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Mimecast/Analytic Rules/MimecastTTP/Mimecast_TTP_Impersonation.yaml
Version	1.0.0
Arm template	c048fa06-0d50-4626-ae82-a6cea812d9c4.json

KQL

MimecastTTPImpersonation
| where ['Tagged Malicious'] == true
| extend SenderAddress = ['Sender Address'],
  SenderIPAddress = ['Sender IP Address'],
  RecipientAddress = ['Recipient Address']

YAML

description: |
    'Detects a maliciously tagged impersonation.'
triggerThreshold: 0
eventGroupingSettings:
  aggregationKind: AlertPerResult
queryPeriod: 30m
suppressionEnabled: false
triggerOperator: gt
kind: Scheduled
relevantTechniques:
- T1114
query: |
  MimecastTTPImpersonation
  | where ['Tagged Malicious'] == true
  | extend SenderAddress = ['Sender Address'],
    SenderIPAddress = ['Sender IP Address'],
    RecipientAddress = ['Recipient Address']  
queryFrequency: 30m
requiredDataConnectors:
- connectorId: MimecastTTPAPI
  dataTypes:
  - MimecastTTPImpersonation
name: Mimecast Targeted Threat Protection - Impersonation Protect
severity: High
suppressionDuration: 5h
entityMappings:
- fieldMappings:
  - identifier: Sender
    columnName: SenderAddress
  - identifier: SenderIP
    columnName: SenderIPAddress
  - identifier: Recipient
    columnName: RecipientAddress
  entityType: MailMessage
version: 1.0.0
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Mimecast/Analytic Rules/MimecastTTP/Mimecast_TTP_Impersonation.yaml
status: Available
id: c048fa06-0d50-4626-ae82-a6cea812d9c4
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    matchingMethod: AllEntities
    enabled: true
    lookbackDuration: P7D
    reopenClosedIncident: false
tactics:
- Exfiltration
- Collection
- Discovery

ARM