Name:Azure AD Block User Consent For Risky Apps Disabled id:875de3d7-09bc-4916-8c0a-0929f4ced3d8 version:4 date:2024-09-30 author:Mauricio Velazco, Splunk status:production type:TTP Description:The following analytic detects when the risk-based step-up consent security setting in Azure AD is disabled. It monitors Azure Active Directory logs for the "Update authorization policy" operation, specifically changes to the "AllowUserConsentForRiskyApps" setting. This activity is significant because disabling this feature can expose the organization to OAuth phishing threats by allowing users to grant consent to potentially malicious applications. If confirmed malicious, attackers could gain unauthorized access to user data and sensitive information, leading to data breaches and further compromise within the organization. Data_source:
-Azure Active Directory Update authorization policy
how_to_implement:You must install the latest version of Splunk Add-on for Microsoft Cloud Services from Splunkbase (https://splunkbase.splunk.com/app/3110/#/details). You must be ingesting Azure Active Directory events into your Splunk environment through an EventHub. This analytic was written to be used with the azure:monitor:aad sourcetype leveraging the AuditLog log category. known_false_positives:Legitimate changes to the 'risk-based step-up consent' setting by administrators, perhaps as part of a policy update or security assessment, may trigger this alert, necessitating verification of the change's intent and authorization References: -https://attack.mitre.org/techniques/T1562/ -https://goodworkaround.com/2020/10/19/a-look-behind-the-azure-ad-permission-classifications-preview/ -https://learn.microsoft.com/en-us/entra/identity/enterprise-apps/configure-risk-based-step-up-consent -https://learn.microsoft.com/en-us/defender-cloud-apps/investigate-risky-oauth drilldown_searches: name:'View the detection results for - "$user$"' search:'%original_detection_search% | search user = "$user$"' earliest_offset:'$info_min_time$' latest_offset:'$info_max_time$' name:'View risk events for the last 7 days for - "$user$"' search:'| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$user$") starthoursago=168 | stats count min(_time) as firstTime max(_time) as lastTime values(search_name) as "Search Name" values(risk_message) as "Risk Message" values(analyticstories) as "Analytic Stories" values(annotations._all) as "Annotations" values(annotations.mitre_attack.mitre_tactic) as "ATT&CK Tactics" by normalized_risk_object | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`' earliest_offset:'$info_min_time$' latest_offset:'$info_max_time$' tags: analytic_story: - 'Azure Active Directory Account Takeover' asset_type:Azure Tenant confidence:50 impact:60 message:User $user$ disabled the BlockUserConsentForRiskyApps Azure AD setting. mitre_attack_id: - 'T1562' observable: name:'user' type:'User' - role: - 'Victim' product: - 'Splunk Enterprise' - 'Splunk Enterprise Security' - 'Splunk Cloud' risk_score:30 required_fields: - '_time' - 'operationName' - 'properties.targetResources{}.modifiedProperties{}.displayName' - 'properties.targetResources{}.modifiedProperties{}.newValue' - 'user' - 'src_ip' security_domain:identity
