Name:Azure AD User Enabled And Password Reset id:1347b9e8-2daa-4a6f-be73-b421d3d9e268 version:14 date:None author:Mauricio Velazco, Gowthamaraj Rajendran, Splunk status:production type:TTP Description:The following analytic detects an Azure AD user enabling a previously disabled account and resetting its password within 2 minutes. It uses Azure Active Directory events to identify this sequence of actions. This activity is significant because it may indicate an adversary with administrative access attempting to establish a backdoor identity within the Azure AD tenant. If confirmed malicious, this could allow the attacker to maintain persistent access, escalate privileges, and potentially exfiltrate sensitive information from the environment. Data_source:
-Azure Active Directory Enable account
-Azure Active Directory Reset password (by admin)
-Azure Active Directory Update user
search:`azure_monitor_aad` (operationName="Enable account" OR operationName="Reset password (by admin)" OR operationName="Update user")
| transaction user startsWith=(operationName="Enable account") endsWith=(operationName="Reset password (by admin)") maxspan=2m
| rename properties.* as *
| rename initiatedBy.user.userPrincipalName as initiatedBy
| fillnull
| stats count min(_time) as firstTime max(_time) as lastTime BY dest user src vendor_account vendor_product initiatedBy signature
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:While not common, Administrators may enable accounts and reset their passwords for legitimate reasons. Filter as needed. References: -https://attack.mitre.org/techniques/T1098/ 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 ("$user$") | 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:'7d' latest_offset:'0' analytic_story:['Azure Active Directory Persistence', 'Scattered Lapsus$ Hunters']
