Name:Windows Potential Web Shell Creation For VMware Workspace ONE id:7d15f645-58cc-4cb7-a9bf-2dcf15bc4b28 version:2 date:None author:Raven Tait, Splunk status:production type:Anomaly Description:This analytic looks for evidence of web shells being created in the VMware Workspace ONE path on Windows or Linux systems, which has been actively exploited by attackers via CVE-2022-22954. Data_source:
-Sysmon EventID 11
search:| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime
from datamodel=Endpoint.Filesystem where
Filesystem.file_path IN ( "*/vmware/horizon/workspace/webapps/*", "*\\vmware\\horizon\\workspace\\webapps\\*" ) Filesystem.file_path="*.jsp"
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:Some legitimate software updates or administrative scripts may create files in the VMware Workspace ONE path, triggering alerts. Review and allow trusted processes to reduce false positives. References: -https://unit42.paloaltonetworks.com/cve-2022-22954-vmware-vulnerabilities/ 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:['VMware Aria Operations vRealize CVE-2023-20887', 'VMware Server Side Injection and Privilege Escalation', 'VMware ESXi AD Integration Authentication Bypass CVE-2024-37085']
