Name:Linux Suspicious GCC Invocation Building Init Shared Object id:9dbf4a61-0493-43bd-932c-532ba7671a7a version:1 date:None author:Raven Tait, Splunk status:production type:TTP Description:The following analytic detects compiler usage with flags commonly used to create shared libraries that auto-run initialization functions, which are often associated with local privilege escalation exploits. Data_source:
-Sysmon for Linux EventID 1
search:| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime
how_to_implement:The detection is based on data that originates from Endpoint Detection and Response (EDR) agents. These agents are designed to provide security-related telemetry from the endpoints where the agent is installed. To implement this search, you must ingest logs that contain the process GUID, process name, and parent process. Additionally, you must ingest complete command-line executions. These logs must be processed using the appropriate Splunk Technology Add-ons that are specific to the EDR product. The logs must also be mapped to the `Processes` node of the `Endpoint` data model. Use the Splunk Common Information Model (CIM) to normalize the field names and speed up the data modeling process. known_false_positives:Legitimate developers may use these GCC flags when building shared libraries that require initialization functions. Filter based on known development environments and trusted users. References: -https://www.bleepingcomputer.com/news/security/cisa-warns-of-critical-linux-sudo-flaw-exploited-in-attacks/ -https://github.com/pr0v3rbs/CVE-2025-32463_chwoot drilldown_searches: earliest_offset:'$info_min_time$' latest_offset:'$info_max_time$' name:'View the detection results for - "$user$" and "$dest$"' search:'%original_detection_search% | search user = "$user$" dest = "$dest$"' name:'View risk events for the last 7 days for - "$user$" and "$dest$"' search:'| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$user$", "$dest$") | 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:['Linux Privilege Escalation', 'Linux Post-Exploitation', 'Linux Persistence Techniques']
