Mailbox enumeration activity by Azure application

Cortex XDR Analytics Alert Reference by data source

Product
Cortex XDR
Last date published
2024-12-03
Category
Analytics Alert Reference
Order
data source

Synopsis

Activation Period

14 Days

Training Period

30 Days

Test Period

10 Minutes

Deduplication Period

5 Days

Required Data

  • Requires:
    • Azure Audit Log

Detection Modules

Cloud

Detector Tags

ATT&CK Tactic

Discovery (TA0007)

ATT&CK Technique

Cloud Service Discovery (T1526)

Severity

Informational

Description

Microsoft Graph API was used to enumerate mailboxes in Azure tenant.

Attacker's Goals

To extract sensitive information stored in mailboxes.

Investigative actions

  • Determine which mailboxes were enumerated and whether they contained any sensitive information.
  • Investigate the identity following actions.

Variations

Mailbox enumeration activity by Azure user

Synopsis

ATT&CK Tactic

Discovery (TA0007)

ATT&CK Technique

Cloud Service Discovery (T1526)

Severity

Informational

Description

Microsoft Graph API was used by a user to enumerate mailboxes.

Attacker's Goals

To extract sensitive information stored in mailboxes.

Investigative actions

  • Determine which mailboxes were enumerated and whether they contained any sensitive information.
  • Investigate the identity following actions.