Attempted Azure application access from unknown tenant

Cortex XDR Analytics Alert Reference by Alert name

Product
Cortex XDR
Last date published
2025-03-18
Category
Analytics Alert Reference
Index by
Alert name

Synopsis

Activation Period

14 Days

Training Period

30 Days

Test Period

N/A (single event)

Deduplication Period

5 Days

Required Data

  • Requires:
    • Azure Audit Log

Detection Modules

Cloud

Detector Tags

Microsoft Graph Activity Logs

ATT&CK Tactic

Initial Access (TA0001)

ATT&CK Technique

Trusted Relationship (T1199)

Severity

Informational

Description

A Microsoft Graph API was unsuccessfully executed by an Azure application from an unknown tenant.

Attacker's Goals

Abuse serverless services to execute code in cloud environments.

Investigative actions

  • Validate the legitimacy of the tenant in question.
  • Investigate any unusual activity originating from the application.

Variations

Attempted Azure application access from an unusual tenant

Synopsis

ATT&CK Tactic

Initial Access (TA0001)

ATT&CK Technique

Trusted Relationship (T1199)

Severity

Medium

Description

A Microsoft Graph API was unsuccessfully executed by an Azure application from an unknown tenant.

Attacker's Goals

Abuse serverless services to execute code in cloud environments.

Investigative actions

  • Validate the legitimacy of the tenant in question.
  • Investigate any unusual activity originating from the application.


Azure application access from unknown tenant

Synopsis

ATT&CK Tactic

Initial Access (TA0001)

ATT&CK Technique

Trusted Relationship (T1199)

Severity

Low

Description

A Microsoft Graph API was executed by an Azure application from an unknown tenant.

Attacker's Goals

Abuse serverless services to execute code in cloud environments.

Investigative actions

  • Validate the legitimacy of the tenant in question.
  • Investigate any unusual activity originating from the application.