AI Security Analysis: Cyber 57 Shield

Analysis generated: 2025-12-11T14:18:52+13:00
Model: gemini-3-pro-preview

Quick Facts

AI Analysis

Based on the data provided, here is the security analysis for the "Cyber 57 Shield" extension.

Executive Summary

Cyber 57 Shield represents a CRITICAL security threat and should be considered malicious. Despite its description as a security tool designed to "block known malicious sites," the analysis reveals over 27,000 security findings, including thousands of high-severity malware signatures indicating attempts at system command execution, file manipulation, and obfuscation. With only 7 users and an unverified publisher, this extension exhibits the classic characteristics of "fake security software" or a Trojan horse. Immediate removal and blocking are required.

Threat Assessment

The security posture of this extension is non-existent; it appears to be an active threat vector.

• Malicious Behavior Patterns: The analysis identified 7,127 high-severity malware signatures. The recurring presence of postinstall_ tags (e.g., postinstall_system_command, postinstall_file_manipulation) suggests the extension contains scripts designed to execute immediately after deployment. These behaviors are typical of malicious "droppers" or supply chain attacks where the goal is to compromise the host system, not just the browser environment.
• System Integrity Risk: Findings such as postinstall_environment_access and postinstall_file_download indicate capabilities that exceed standard browser extension permissions. This suggests the extension may be attempting to download additional payloads or access local environment variables (which often contain API keys or credentials).
• Evasion Techniques: The high volume of postinstall_obfuscation findings indicates that the code is deliberately hidden or packed to bypass traditional security scanners. Legitimate open-source or commercial extensions rarely use heavy obfuscation unless they are hiding malicious logic.
• Reputational Indicators: The extension has a Trust Score of 0/100, is published by an unverified entity, and has a negligible user base (7 users). There is no community validation or history to support its legitimacy.

Risk Justification

The calculated Risk Score of 100.0/100 is fully justified and accurate.

• Severity of Findings: The presence of system_command and file_manipulation signatures elevates this from a privacy risk (e.g., tracking) to a system compromise risk.
• Volume of Anomalies: A total of 27,240 findings is statistically impossible for a legitimate, well-coded browser extension. This volume suggests the inclusion of massive malicious libraries or a "spray and pray" approach to malware inclusion.
• Deceptive Nature: The extension masquerades as a security tool ("Shield"), which is a common social engineering tactic to trick users into granting extensive permissions.

Key Findings

• System Command Execution (postinstall_system_command): Multiple high-severity matches indicate the code attempts to execute commands on the underlying operating system, presenting a risk of full system takeover.
• File System Manipulation (postinstall_file_manipulation): The extension contains logic to create, modify, or delete files on the host, which is highly suspicious for a browser plugin.
• Heavy Obfuscation (postinstall_obfuscation): A significant portion of the code is obfuscated, preventing easy analysis and likely hiding malicious payloads.
• Environment Access (postinstall_environment_access): The code attempts to read environment variables, a common technique used by malware to steal developer credentials (AWS keys, API tokens) or system configuration data.
• Network Beacons (postinstall_network_communication): The extension initiates network connections that match malware command-and-control (C2) patterns, likely to exfiltrate data or receive instructions.

Recommendations

1. Immediate Removal: Uninstall the extension from all browsers immediately.
2. Organizational Block: Add the Extension UUID (1085e377-2939-5aca-a340-23d8fc52c4f5) to the enterprise blocklist (e.g., Google Admin Console or Group Policy) to prevent installation.
3. Endpoint Scan: Run a full antivirus/EDR scan on any machine where this extension was installed. The file_manipulation findings suggest it may have dropped files outside the browser sandbox.
4. Credential Rotation: As a precaution, rotate credentials for any active sessions or environment variables present on the machine during the time the extension was installed, due to the environment_access findings.
5. Network Investigation: Review firewall logs for unexpected outbound traffic from endpoints that had this extension installed, specifically looking for connections to unknown IPs.

Mitigation Strategies

There is no safe mitigation strategy that allows for the continued use of this extension.

• The risk score is 100/100. The fundamental function of the code appears to be malicious.
• Alternative: Replace this tool with verified, enterprise-grade browser security solutions (e.g., Microsoft Defender Browser Protection, uBlock Origin, or commercial endpoint protection browser plugins).

Confidence Assessment

Confidence Level: High (80-90%)
While static analysis (YARA rules) can sometimes generate false positives, the sheer volume (27,000+) and the specific combination of system command, obfuscation, and network signatures make it statistically improbable that this is benign code. The low user count and unverified publisher further solidify the assessment that this is a malicious actor. The only missing data point for 100% confidence is dynamic analysis (sandboxed execution) to observe the specific C2 servers it contacts.

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.