yixuecheng[.]cn

This domain, yixuecheng.cn, is assessed as an elevated-risk credential harvesting phishing site targeting user login credentials. Analysis indicates the infrastructure was actively employed to mimic legitimate authentication portals, likely aiming to exfiltrate sensitive account details such as usernames, passwords, or session tokens. The domain’s current offline status suggests a temporary takedown, though historical activity remains a concern for potential victims. Infrastructure analysis reveals the domain resolved to the IP address 203.160.53.242, hosted under AS55933 (Cloudie Limited) in Hong Kong. It was registered through Dynadot LLC, a registrar frequently observed in phishing campaigns due to its accessibility and minimal verification requirements. At the time of assessment, 17 out of 95 security vendors on VirusTotal flagged the domain as malicious, with detections spanning generic phishing and credential theft classifications. The domain appears on at least one security blocklist, and its SSL certificate, issued by Let’s Encrypt (R13), follows a pattern commonly exploited by threat actors to lend superficial legitimacy to fraudulent sites. No creation date was provided, but the combination of technical indicators strongly correlates with short-lived, high-velocity phishing operations. Mitigation measures for this threat type include immediate verification of any login attempts made to yixuecheng.cn, particularly if credentials were entered prior to its takedown. Affected users should rotate passwords for all accounts where identical or similar credentials may have been reused, prioritizing email, financial, and administrative portals. Organizations are advised to implement domain-based blocking for yixuecheng.cn and its associated IP (203.160.53.242) across web gateways and endpoint protection systems. Security teams should monitor for anomalous authentication attempts, particularly those originating from the Hong Kong region or AS55933, and enable multi-factor authentication to mitigate the impact of credential compromise. Proactive threat hunting for related domains registered via Dynadot LLC may uncover additional infrastructure linked to this campaign.