Non Firefox Process Access Firefox Profile Dir
The following analytic detects non-Firefox processes accessing the Firefox profile directory, which contains sensitive user data such as login credentials, browsing history, and cookies. It leverages Windows Security…
Description
The following analytic detects non-Firefox processes accessing the Firefox profile directory, which contains sensitive user data such as login credentials, browsing history, and cookies. It leverages Windows Security Event logs, specifically event code 4663, to monitor access attempts. This activity is significant because it may indicate attempts by malware, such as RATs or trojans, to harvest user information. If confirmed malicious, this behavior could lead to data exfiltration, unauthorized access to user accounts, and further compromise of the affected system.
Detection logic
Detection requirements
- Platform
- LinuxmacOSWindows
The rule states no platform. This is derived from the ATT&CK technique it maps to.
- Log source category
- windows_event_log_security_4663
Known benign triggers
- other browser not listed related to firefox may catch by this rule.
MITRE ATT&CK mappings
0 exclusive techniques.This is coverage no other published rule has; it is not this rule's total technique count.
No references are available for this detection.
From the source
- At source
- Open at source
- Upstream identifier
- e6fc13b0-1609-11ec-b533-acde48001122
- Tagged by the source as
- 0bj3ctivity Stealer3CX Supply Chain AttackAgentTeslaAzorultBlankGrabber StealerChina-Nexus Threat ActivityCISA AA23-347ADarkGate MalwareFIN7LokibotMalicious Inno Setup LoaderNjRATPhantom StealerPhemedrone StealerQuasar RATRedLine StealerRemcosSalat StealerSalt TyphoonSnake KeyloggerSnappyBeeStealC StealerVidar StealerVIP KeyloggerWarzone RATEndpointendpointSplunk CloudSplunk EnterpriseSplunk Enterprise Securityendpoint
Licence
- Published under
- Apache License 2.0Read the licence
- Attribution
- Required
- Obtained under
- Apache-2.0Read the origin licence
Authorship
- Written by
- Published
- Aug 26, 2026
- Version
- 1