High-Risk Admin Activity

Requête originale, sans modification.

let AdminActivity = dynamic(["iam.role.create","iam.role.permissions.add","user.session.access_admin_app","user.mfa.factor.suspend", "user.account.privilege.grant", "group.privilege.grant", "system.api_token.create", "user.session.impersonation.grant"]);
// Define the list of allowed admins to exclude from the alert. This can be modified to include specific admin accounts that are known to perform high-risk activities as part of their job function.
let AllowedAdmins = dynamic([]);
let AdminOperations = OktaSSO
| where actor_alternateId_s !in (AllowedAdmins)
| where eventType_s in (AdminActivity)
| where outcome_result_s =~ 'SUCCESS' 
| summarize  StartTime = min(TimeGenerated), EndTime = max(TimeGenerated) by  actor_alternateId_s, actor_displayName_s, client_userAgent_os_s, client_userAgent_browser_s, client_device_s, client_userAgent_rawUserAgent_s, client_ipAddress_s, client_geographicalContext_country_s, client_geographicalContext_city_s, displayMessage_s, outcome_result_s, outcome_reason_s, column_ifexists('debugContext_debugData_logOnlySecurityData_s', ""), column_ifexists('debugContext_debugData_threatSuspected_s', ""), client_geographicalContext_geolocation_lat_d, client_geographicalContext_geolocation_lon_d, authenticationContext_externalSessionId_s;
let HighRiskEvents = OktaSSO
| where eventType_s in ('policy.evaluate_sign_on' , 'user.session.start')
| extend debugContext_debugData_logOnlySecurityData_s = column_ifexists('debugContext_debugData_logOnlySecurityData_s', '{}')
| where parse_json(tostring(parse_json(debugContext_debugData_logOnlySecurityData_s).risk)).level =~ "HIGH"
| where outcome_result_s =~ 'SUCCESS'
| extend reasons = tostring(parse_json(tostring(parse_json(debugContext_debugData_logOnlySecurityData_s).risk)).reasons)
| summarize  StartTime = min(TimeGenerated), EndTime = max(TimeGenerated) by  actor_alternateId_s, actor_displayName_s, client_userAgent_os_s, client_userAgent_browser_s, client_device_s, client_userAgent_rawUserAgent_s, client_ipAddress_s, client_geographicalContext_country_s, client_geographicalContext_city_s, displayMessage_s, outcome_result_s, outcome_reason_s, column_ifexists('debugContext_debugData_logOnlySecurityData_s', ""), column_ifexists('debugContext_debugData_threatSuspected_s', ""), client_geographicalContext_geolocation_lat_d, client_geographicalContext_geolocation_lon_d, authenticationContext_externalSessionId_s, reasons;
AdminOperations
| join kind=inner (HighRiskEvents) on actor_displayName_s, client_ipAddress_s, authenticationContext_externalSessionId_s
| project StartTime, EndTime, actor_alternateId_s, actor_displayName_s, client_userAgent_os_s, client_userAgent_browser_s, client_device_s, client_userAgent_rawUserAgent_s, client_ipAddress_s, client_geographicalContext_country_s, client_geographicalContext_city_s, displayMessage_s, outcome_result_s, outcome_reason_s, column_ifexists('debugContext_debugData_logOnlySecurityData_s', ""), column_ifexists('debugContext_debugData_threatSuspected_s', ""), client_geographicalContext_geolocation_lat_d, client_geographicalContext_geolocation_lon_d, authenticationContext_externalSessionId_s, reasons
| extend AccountName = tostring(split(actor_alternateId_s, "@")[0]), AccountUPNSuffix = tostring(split(actor_alternateId_s, "@")[1])