Unusual Conditional Access operation for an identity

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	1 Day
Required Data	AzureAD Audit Log
Detection Modules	Identity Threat Module, SaaS Threat Detection
ATT&CK Tactic	Defense Impairment (TA0112)
ATT&CK Technique	Modify Authentication Process: Conditional Access Policies (T1556.009)
Severity	Informational

Description

An identity attempted to add or update an Azure AD Conditional Access policy.

Attacker's Goals

• An attacker attempts to change Active Directory configuration for persistence or defense evasion.
• With a modified Conditional Access policy, an attacker might be able to access the tenant without possible blockage for later access.

Investigative actions

• Check implications of the updated policy.
• Check whether the user changing the configuration is permitted to perform such actions.

Variations

Suspicious Conditional Access operation for an identity

Synopsis

Field	Value
ATT&CK Tactic	Defense Impairment (TA0112)
ATT&CK Technique	Modify Authentication Process: Conditional Access Policies (T1556.009)
Severity	Low

Description

An identity that doesn't usually modify Azure AD Conditional Access policies successfully modified a policy.

Attacker's Goals

• An attacker attempts to change Active Directory configuration for persistence or defense evasion.
• With a modified Conditional Access policy, an attacker might be able to access the tenant without possible blockage for later access.

Investigative actions

• Check implications of the updated policy.
• Check whether the user changing the configuration is permitted to perform such actions.