Attempted Azure application access from unknown tenant

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	5 Days
Required Data	Requires one of the following data sources: Azure Audit Log OR Microsoft Graph Logs
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

Field	Value
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

Field	Value
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.