Name:Windows Credentials from Password Stores Chrome Extension Access id:2e65afe0-9a75-4487-bd87-ada9a9f1b9af version:14 date:None author:Teoderick Contreras, Splunk status:production type:Anomaly Description:The following analytic detects non-Chrome processes attempting to access the Chrome extensions file.
It leverages Windows Security Event logs, specifically event code 4663, to identify this behavior.
This activity is significant because adversaries may exploit this file to extract sensitive information from the Chrome browser, posing a security risk.
If confirmed malicious, this could lead to unauthorized access to stored credentials and other sensitive data, potentially compromising the security of the affected system and broader network. Data_source:
-Windows Event Log Security 4663
search:`wineventlog_security` EventCode=4663 object_file_path="*\\AppData\\Local\\Google\\Chrome\\User Data\\Default\\Local Extension Settings\\*" NOT process_path IN ( "*:\\Windows\\explorer.exe", "*\\AppData\\Local\\Google\\Chrome Beta\\Application\\chrome.exe", "*\\AppData\\Local\\Google\\Chrome Dev\\Application\\chrome.exe", "*\\AppData\\Local\\Google\\Chrome SxS\\Application\\chrome.exe", "*\\AppData\\Local\\Google\\Chrome Unstable\\Application\\chrome.exe", "*\\AppData\\Local\\Google\\Chrome\\Application\\chrome.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
how_to_implement:To successfully implement this search, you must ingest Windows Security Event logs and track event code 4663.
For 4663, enable "Audit Object Access" in Group Policy. Then check the two boxes listed for both "Success" and "Failure." known_false_positives:The chrome uninstaller will access these set of files and folders. Filter as needed. References: -https://malpedia.caad.fkie.fraunhofer.de/details/win.redline_stealer 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:['StealC Stealer', 'DarkGate Malware', 'Amadey', 'Meduza Stealer', 'Malicious Inno Setup Loader', 'Phemedrone Stealer', 'CISA AA23-347A', 'RedLine Stealer', 'Braodo Stealer', 'MoonPeak', '0bj3ctivity Stealer', 'BlankGrabber Stealer', 'Phantom Stealer', 'Vidar Stealer']
