Name:Windows Suspicious Child Process of TieringEngineService.exe id:69edec6c-877e-4423-9b9b-025b589123a8 version:1 date:None author:Raven Tait, Splunk status:production type:TTP Description:Detects the RedSun privilege escalation exploit delivering a SYSTEM-level shell to the attacker's session.
RedSun replaces the legitimate TieringEngineService.exe with a malicious binary, which launches a process as SYSTEM, usually some sort of shell or shell spawner (conhost.exe, cmd.exe, PowerShell, etc.) in the attacker's active session. Data_source:
-Sysmon EventID 1
-Windows Event Log Security 4688
-CrowdStrike ProcessRollup2
search:| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime
FROM datamodel=Endpoint.Processes WHERE
Processes.parent_process_name="TieringEngineService.exe" ( Processes.process IN ( "*bitsadmin.exe*", "*cmd.exe*", "*conhost.exe*", "*cscript.exe*", "*curl.exe*", "*powershell.exe*", "*pwsh.exe*", "*rundll32.exe*", "*wmic.exe*" ) OR Processes.process_name IN ( "bitsadmin.exe", "cmd.exe", "conhost.exe", "cscript.exe", "curl.exe", "powershell.exe", "pwsh.exe", "rundll32.exe", "wmic.exe" ) ) Processes.user IN ( "*AUTHORITY*", "*System*" )
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:No false positives have been identified at this time. References: -https://github.com/Nightmare-Eclipse/RedSun -https://www.huntress.com/blog/nightmare-eclipse-intrusion 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 ("$dest$") | 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:['RedSun', 'Windows Privilege Escalation']
