by[.]4qiuj[.]com

This domain, by.4qiuj.com, poses a significant threat as a generic phishing site. It is designed to deceive users into divulging sensitive information such as login credentials, financial details, or personal data. The domain's infrastructure and technical indicators suggest a high level of sophistication and intent to harm, making it a critical security concern for users and organizations alike.

Infrastructure analysis reveals that by.4qiuj.com is flagged by 17 out of 95 security vendors on VirusTotal, indicating a substantial level of suspicion and potential malicious activity. The domain is registered through Gname.com Pte. Ltd. and was created on March 26, 2025. It resolves to the IP address 154.82.96.166, which is located in the United States and is part of the AS399077 Tcloudnet network. Additionally, the domain appears on one security blocklist and is actively blocked by PhishDestroy, further corroborating its high-risk status. The SSL certificate is issued by Let's Encrypt, which, while legitimate, is often used by malicious actors due to its ease of acquisition and credibility.

If users have visited by.4qiuj.com, they should immediately check their accounts for any unauthorized activity and consider changing their passwords. It is recommended to run a full system scan using reputable antivirus software to identify and remove any potential malware. Users should also be vigilant and avoid clicking on any links or providing personal information on similar domains. Reporting the incident to their IT department or a cybersecurity professional is advised to ensure comprehensive protection and to prevent further compromise.