Name:Azure AD PIM Role Assigned id:fcd6dfeb-191c-46a0-a29c-c306382145ab version:5 date:2024-09-30 author:Mauricio Velazco, Splunk status:production type:TTP Description:The following analytic detects the assignment of an Azure AD Privileged Identity Management (PIM) role. It leverages Azure Active Directory events to identify when a user is added as an eligible member to a PIM role. This activity is significant because PIM roles grant elevated privileges, and their assignment should be closely monitored to prevent unauthorized access. If confirmed malicious, an attacker could exploit this to gain privileged access, potentially leading to unauthorized actions, data breaches, or further compromise of the environment. Data_source:
-Azure Active Directory
search:`azure_monitor_aad` operationName="Add eligible member to role in PIM completed*" | rename properties.* as * | stats count min(_time) as firstTime max(_time) as lastTime values(user) as user values(targetResources{}.displayName) as displayName by result, operationName, initiatedBy.user.displayName | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `azure_ad_pim_role_assigned_filter`
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. This analytic was written to be used with the azure:monitor:aad sourcetype leveraging the AuditLog log category. known_false_positives:As part of legitimate administrative behavior, users may be assigned PIM roles. Filter as needed References: -https://learn.microsoft.com/en-us/azure/active-directory/privileged-identity-management/pim-configure -https://learn.microsoft.com/en-us/azure/active-directory/privileged-identity-management/pim-how-to-activate-role -https://microsoft.github.io/Azure-Threat-Research-Matrix/PrivilegeEscalation/AZT401/AZT401/ 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 Privilege Escalation' - 'Azure Active Directory Persistence' asset_type:Azure Active Directory confidence:50 impact:70 message:An Azure AD PIM role assignment was assiged to $user$ mitre_attack_id: - 'T1098' - 'T1098.003' observable: name:'user' type:'User' - role: - 'Victim' product: - 'Splunk Enterprise' - 'Splunk Enterprise Security' - 'Splunk Cloud' risk_score:35 required_fields: - '_time' - 'properties' - 'operationName' - 'user' - 'initiatedBy.user.userPrincipalName' - 'result' security_domain:identity
