ConditionalAccess - ChangePolicy.md

Change Conditional Access Policy

Query Information

MITRE ATT&CK Technique(s)

Technique ID	Title	Link
T1556	Modify Authentication Process	https://attack.mitre.org/techniques/T1556/

Description

This KQL query lists all conditional access policies that have been changed. The modification of authentication processes can be used to create persistence on an cloud account.

Risk

Adveries can update CA policies to get persistence by removing the necessary strong authentication mechanisms for a account.

References

• https://learn.microsoft.com/en-us/azure/active-directory/architecture/security-operations-consumer-accounts
• https://learn.microsoft.com/en-us/azure/active-directory/conditional-access/

Sentinel

AuditLogs
| where OperationName == "Update conditional access policy"
| extend DeletedPolicy = TargetResources.[0].displayName, Actor = InitiatedBy.user.userPrincipalName
| project TimeGenerated, Actor, DeletedPolicy, TargetResources