AI Security Analysis: Feedly Mini

Analysis generated: 2025-12-12T20:17:35+13:00
Model: gemini-3-pro-preview

Quick Facts

AI Analysis

Executive Summary

DO NOT INSTALL / UNINSTALL IMMEDIATELY.
This extension poses a CRITICAL security risk and exhibits multiple characteristics of malicious software. The analysis indicates a high probability that this is a fake or compromised version of "Feedly Mini," evidenced by an unverified publisher status, a suspiciously low user count (1,561), and 83 specific malware signatures indicating capabilities to modify system registries, execute system commands, and establish persistence.

Threat Assessment

The security posture of this extension is non-existent (Trust Score: 0/100). The analysis reveals a severe threat profile:

• Impersonation Risk: The extension claims to be "Feedly Mini" but is published by an unverified developer. The legitimate Feedly user base is in the millions; a user count of 1,561 strongly suggests this is a malicious clone designed to deceive users.
• Malware Capabilities: The YARA rules triggered (postinstall_...) are highly specific and concerning. They suggest the presence of malicious scripts often associated with supply chain attacks (e.g., compromised npm packages bundled into the extension).
• System-Level Impact: Unlike typical privacy-invasive extensions that only track browsing, this extension contains signatures for Registry Modification and System Command Execution. This implies the extension attempts to break out of the browser sandbox to affect the underlying operating system.
• Dropper Behavior: The presence of postinstall_file_download and postinstall_file_manipulation suggests the extension may act as a "dropper," downloading and installing additional malicious payloads after the initial installation.

Risk Justification

Risk Score: 100.0/100 (CRITICAL) is fully justified and accurate.

1. Severity of Indicators: The findings are not merely "bad practices" (like using eval()); they are active malware signatures. The presence of persistence_mechanism and registry_modification elevates this from a browser threat to a full system compromise threat.
2. Volume of Findings: 2,634 total findings with 88 HIGH severity issues indicates a codebase that is fundamentally unsafe or heavily comprised of malicious libraries.
3. Lack of Accountability: The "Verified Publisher: false" status removes any chain of trust.

Key Findings

• Malware Signature - Registry Modification: (Finding #18) The extension contains code capable of modifying the Windows Registry. Legitimate browser extensions rarely, if ever, require this capability.
• Malware Signature - System Command Execution: (Finding #10, #19, #26) Indicators show the extension can execute shell commands on the host operating system, presenting a Remote Code Execution (RCE) risk.
• Malware Signature - Persistence Mechanism: (Finding #27) The code contains logic designed to ensure the malware survives browser restarts or attempts at removal.
• Malware Signature - File Download/Dropper: (Finding #1, #7, #17) The extension appears capable of silently downloading and executing external files.
• Unverified Publisher & Low User Count: The metadata contradicts the profile of the legitimate Feedly brand, confirming a likely impersonation attack.

Recommendations

1. Immediate Removal: If installed, uninstall this extension immediately.
2. System Remediation: Because findings indicate "Registry Modification" and "Persistence Mechanisms," a simple uninstall may not be sufficient. Run a full anti-malware scan on the host endpoint to detect any dropped payloads.
3. Credential Rotation: Assume all data accessed via the browser (passwords, session tokens) while this extension was active has been compromised. Rotate credentials for sensitive accounts.
4. Blocklist: Add UUID 71e2e32e-86ff-567a-9796-c036e0f44992 to the organization's browser policy blocklist.
5. Report: Report the extension to the Firefox Add-ons store as malicious/impersonation.

Mitigation Strategies

There is no safe way to use this extension.
Given the presence of malware signatures related to system commands and registry modification, "mitigation" is not applicable. The risk cannot be reduced by restricting permissions because the malicious code is embedded within the extension's files. The only mitigation is total avoidance.

Confidence Assessment

Confidence: 80%
The analysis is based on static analysis and YARA signature matching. While YARA rules can occasionally produce false positives, the combination of specific "postinstall" malware signatures, the unverified publisher status, and the suspicious user count creates a convergence of evidence that makes the "Malicious" verdict highly reliable. The specific rule names (postinstall_...) strongly resemble signatures for known malicious packages often found in the JavaScript/npm ecosystem.

Disclaimer

This analysis was generated by an AI model and should be reviewed by security professionals. The findings are based on automated security scanning and may include false positives. Always verify critical findings manually before taking action.