Techniques
Sample rules
Windows Credentials from Password Stores Chrome LocalState Access
- source: splunk
- technicques:
- T1012
Description
The following analytic detects non-Chrome processes accessing the Chrome “Local State” file, which contains critical settings and information. It leverages Windows Security Event logs, specifically event code 4663, to identify this behavior. This activity is significant because threat actors can exploit this file to extract the encrypted master key used for decrypting saved passwords in Chrome. If confirmed malicious, this could lead to unauthorized access to sensitive information, posing a severe security risk. Monitoring this anomaly helps identify potential threats and safeguard browser-stored data.
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`