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O365_Exchange_Set_MailBoxJunkEmailConfiguration

ID: 100434

Description:

Exchange Mailbox Operation: Set-MailboxJunkEmailConfiguration; an infrequent action, while not always malicious itself (check attribute contents), that is often performed by compromized accounts, and occurs with other indicators of compromise.

Repository: Group: Office365 Type: event

Default Status:

Enabled

Tags:    
O365 Office Exchange
     

Selector:

Query:

Filters:

Field MUST hit
@fields.Operation Set-MailboxJunkEmailConfiguration
@fields.Workload Exchange
Field MUST NOT hit
   

Behavior Rule:

Key Type Behavior Category
@fields.UserId username application activity

Risks:

Risks Base Score Dimension
ALERT_HIGH_CONFIDENCE 2000 alert

Attributes:

Alias Key
IP @fields.ClientIP
Operation @fields.Operation
ISP @fields._ip.isp
City @fields._ip.city
Country @fields._ip.country
UserId @fields.UserId
ExternalAccess @fields.ExternalAccess
Identity @fields.ParametersFields.Identity
BlockedSendersAndDomains @fields.ParametersFields.BlockedSendersAndDomains
TrustedSendersAndDomains @fields.ParametersFields.TrustedSendersAndDomains
TrustedRecipientsAndDomains @fields.ParametersFields.TrustedRecipientsAndDomains

Correlation Rules:

First Occurrence:

Name Window Fields
NewUser 10 days @fields.UserId
  Risks: ML_NEW_USER
NewISP 10 days @fields._ip.isp
  Risks: SUSPICIOUS_GEO
NewCountry 10 days @fields._ip.country
  Risks: ML_NEW_GEO_COUNTRY

History:

User Date
2021 Aug 31 21:32:43 EDT
2021 Aug 31 21:34:39 EDT
2021 Aug 31 21:37:30 EDT

This page was automatically created/formatted on Tue, 2021 Oct 19 00:29:17 EDT, from rule_dump.json (db47c470500ce8686ead334f5eda0596)