splApache-2.0from splunk/security_content
Windows Chromium Browser with Custom User Data Directory
The following analytic detects instances where the Chromium-based browser (e.g., Google Chrome, Microsoft Edge) is launched with the --user-data-dir command-line argument. While this flag is legitimate and used for multi-profile support or automation, it is frequently leveraged by malware and adversaries to run Chrome in an isolated environment for stealth operations, credential harvesting, phishing delivery, or evasion of user session artifacts.
Quality
67
FP risk
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Rule sourcedetections/endpoint/windows_chromium_browser_with_custom_user_data_directory.yml
| tstats `security_content_summariesonly` min(_time) as firstTime max(_time)
as lastTime from datamodel=Endpoint.Processes where
Processes.process_name IN ("Chrome.exe","Brave.exe", "Opera.exe", "Vivaldi.exe", "msedge.exe")
Processes.process = "*--user-data-dir*"
Processes.process IN ("*--disable-gpu*", "*--disable-3d-apis*")
by Processes.action Processes.dest Processes.original_file_name Processes.parent_process
Processes.parent_process_exec Processes.parent_process_guid Processes.parent_process_id
Processes.parent_process_name Processes.parent_process_path Processes.process Processes.process_exec
Processes.process_guid Processes.process_hash Processes.process_id Processes.process_integrity_level
Processes.process_name Processes.process_path Processes.user Processes.user_id Processes.vendor_product
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `windows_chromium_browser_with_custom_user_data_directory_filter`