Name:Windows Service Created Within Public Path id:3abb2eda-4bb8-11ec-9ae4-3e22fbd008af version:5 date:2024-09-30 author:Mauricio Velazco, Splunk status:production type:TTP Description:The following analytic detects the creation of a Windows Service with its binary path located in public directories using Windows Event ID 7045. This detection leverages logs from the `wineventlog_system` data source, focusing on the `ImagePath` field to identify services installed outside standard system directories. This activity is significant as it may indicate the installation of a malicious service, often used by adversaries for lateral movement or remote code execution. If confirmed malicious, this could allow attackers to execute arbitrary code, maintain persistence, or further compromise the system. Data_source:
-Windows Event Log System 7045
search:`wineventlog_system` EventCode=7045 ImagePath = "*.exe" NOT (ImagePath IN ("*:\\Windows\\*", "*:\\Program File*", "*:\\Programdata\\*", "*%systemroot%\\*")) | stats count min(_time) as firstTime max(_time) as lastTime by EventCode ImagePath ServiceName ServiceType StartType Computer UserID | rename Computer as dest | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `windows_service_created_within_public_path_filter`
how_to_implement:To successfully implement this search, you need to be ingesting logs with the Service name, Service File Name Service Start type, and Service Type from your endpoints. known_false_positives:Legitimate applications may install services with uncommon services paths. References: -https://docs.microsoft.com/en-us/windows/win32/services/service-control-manager -https://pentestlab.blog/2020/07/21/lateral-movement-services/ 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: - 'Active Directory Lateral Movement' - 'Snake Malware' asset_type:Endpoint confidence:60 impact:90 message:A Windows Service $ServiceName$ with a public path was created on $dest$ mitre_attack_id: - 'T1543' - 'T1543.003' observable: name:'ServiceName' type:'Other' - role: - 'Attacker' name:'dest' type:'Endpoint' - role: - 'Victim' product: - 'Splunk Enterprise' - 'Splunk Enterprise Security' - 'Splunk Cloud' required_fields: - 'EventCode' - 'Service_File_Name' - 'Service_Type' - '_time' - 'Service_Name' - 'Service_Start_Type' risk_score:54 security_domain:endpoint
