Techniques
Sample rules
Windows Credentials from Password Stores Chrome LocalState Access
- source: splunk
- technicques:
- T1012
Description
This analytic is designed to detect non-chrome processes accessing the Chrome user data file called “local state.” This file contains important settings and information related to the browser’s operations on the computer. Threat actors, adversaries, and malware authors have been known to exploit this file in attempts to extract the encrypted master key used for decrypting passwords saved in the Chrome browser. Detecting access to the “local state” file by non-chrome processes serves as a valuable pivot for analyzing suspicious processes beyond the commonly observed chrome.exe and explorer.exe executables. By monitoring for this anomaly, we can improve our ability to identify potential threats and safeguard sensitive information stored within the browser.
Detection logic
`wineventlog_security` EventCode=4663 object_file_path="*\\AppData\\Local\\Google\\Chrome\\User Data\\Local State" NOT (process_name IN ("*\\chrome.exe","*:\\Windows\\explorer.exe"))
| stats count min(_time) as firstTime max(_time) as lastTime by object_file_name object_file_path process_name process_path process_id EventCode dest
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `windows_credentials_from_password_stores_chrome_localstate_access_filter`