Beware: Data-Stealing Chrome Extensions Mimicking Legitimate Tools

TL;DR

• A campaign on the Google Chrome Web Store uses over 100 malicious extensions disguised as legitimate tools to steal browser cookies and execute remote scripts.
• These extensions mimic popular tools like VPNs, AI assistants, and crypto utilities.
• Users are advised to be cautious and verify the authenticity of browser extensions before installation.

Data-Stealing Chrome Extensions Impersonate Legitimate Tools

A recent campaign on the Google Chrome Web Store has been identified, utilizing over 100 malicious browser extensions that mimic legitimate tools. These extensions, disguised as VPNs, AI assistants, and crypto utilities, are designed to steal browser cookies and execute remote scripts secretly. This sophisticated attack highlights the growing threat of browser-based malware and the importance of vigilance when installing extensions¹.

The Mechanism of the Attack

The malicious extensions operate by stealing browser cookies, which can contain sensitive information such as session tokens and login credentials. Additionally, these extensions have the capability to execute remote scripts, allowing attackers to perform various malicious activities undetected. This dual-pronged approach makes the attack particularly dangerous, as it compromises both user data and system security¹.

Impact and Implications

The impact of this campaign is significant, as it targets a wide range of users who rely on browser extensions for enhanced functionality. The stolen data can be used for various malicious purposes, including unauthorized access to user accounts, identity theft, and further propagation of malware. The use of remote script execution adds another layer of complexity, making detection and mitigation more challenging¹.

Preventive Measures

To protect against such threats, users are advised to:

• Verify Extension Authenticity: Ensure that browser extensions are downloaded from trusted sources and have positive reviews and ratings.
• Regularly Update Browser: Keep the browser and all installed extensions up-to-date to benefit from the latest security patches.
• Use Security Software: Employ reputable security software that can detect and block malicious extensions.

Conclusion

The discovery of this campaign underscores the need for heightened awareness and vigilance when using browser extensions. As cyber threats continue to evolve, staying informed and proactive is crucial.

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References

1. (2025-05-21). “Data-stealing Chrome extensions impersonate Fortinet, YouTube, VPNs”. BleepingComputer. Retrieved 2025-05-21. ↩︎ ↩︎² ↩︎³