Name:Windows Export Certificate id:d8ddfa9b-b724-4df9-9dbe-f34cc0936714 version:4 date:2024-09-30 author:Michael Haag, Splunk status:production type:Anomaly Description:The following analytic detects the export of a certificate from the Windows Certificate Store. It leverages the Certificates Lifecycle log channel, specifically event ID 1007, to identify this activity. Monitoring certificate exports is crucial as certificates can be used for authentication to VPNs or private resources. If malicious actors export certificates, they could potentially gain unauthorized access to sensitive systems or data, leading to significant security breaches. Data_source:
-Windows Event Log CertificateServicesClient 1007
search:`certificateservices_lifecycle` EventCode=1007 | xmlkv UserData_Xml | stats count min(_time) as firstTime max(_time) as lastTime by Computer, SubjectName, UserData_Xml | rename Computer as dest | `security_content_ctime(firstTime)`| `security_content_ctime(lastTime)` | `windows_export_certificate_filter`
how_to_implement:To implement this analytic, you must collect Microsoft-Windows-CertificateServicesClient-Lifecycle-System/Operational or Microsoft-Windows-CertificateServicesClient-Lifecycle-User/Operational. known_false_positives:False positives may be generated based on an automated process or service that exports certificates on the regular. Review is required before setting to alert. Monitor for abnormal processes performing an export. References: -https://atomicredteam.io/defense-evasion/T1553.004/#atomic-test-4---install-root-ca-on-windows drilldown_searches: name:'View the detection results for - "$dest$"' search:'%original_detection_search% | search dest = "$dest$"' earliest_offset:'$info_min_time$' latest_offset:'$info_max_time$' name:'View risk events for the last 7 days for - "$dest$"' search:'| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$dest$") 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: - 'Windows Certificate Services' asset_type:Endpoint confidence:60 impact:60 message:An certificate was exported on $dest$ from the Windows Certificate Store. mitre_attack_id: - 'T1552.004' - 'T1552' - 'T1649' observable: name:'dest' type:'Hostname' - role: - 'Victim' product: - 'Splunk Enterprise' - 'Splunk Enterprise Security' - 'Splunk Cloud' required_fields: - '_time' - 'dest' - 'SubjectName' - 'UserData_Xml' risk_score:36 security_domain:endpoint
