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: Fluency 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 | 30 days | @fields.UserId |
| Risks: | ML_NEW_USER |
History:
| User | Date |
|---|---|
| — | 2021 Aug 31 21:32:43 EDT |
| — | 2021 Aug 31 21:34:39 EDT |
| — | 2021 Aug 31 21:37:30 EDT |
| ke*y@fluencysecurity.com | 2022 Feb 18 01:08:28 EST |
This page was automatically created/formatted on Wed, 2022 May 4 21:43:53 EDT, from rule_dump.json (4d88bffdfb1cea26b3985f2193033606)