coupbb[.]com

This domain is flagged as a high-risk credential theft operation targeting users through deceptive SSL handshake failure pages. Analysis indicates the site impersonates legitimate error messages to trick victims into entering sensitive login credentials, which are then harvested for malicious purposes. The threat type is specifically credential theft, not generic phishing, as evidenced by the page structure and historical patterns of similar campaigns. Infrastructure analysis reveals multiple indicators of compromise. The domain coupbb.com is registered through GoDaddy.com, LLC, and resolves to IP address 172.67.215.40, hosted on Cloudflare infrastructure (AS13335). It was created on May 04, 2026, an anomalous future date suggesting potential domain spoofing or registration manipulation. The SSL certificate is issued by Let's Encrypt (serial number E8), a common choice for both legitimate and malicious sites. Security vendors on VirusTotal flag the domain at 16/95, and it appears on one security blocklist. The page title, 'coupbb.com | 525: SSL handshake failed,' is designed to mimic legitimate SSL errors to deceive users. Mitigation steps for this credential theft threat include immediate blocking of the domain and its resolving IP at the network perimeter. Organizations should implement SSL inspection to detect and prevent connections to domains with anomalous SSL handshake failures. User education should emphasize verifying SSL errors through trusted channels rather than interacting with error pages. Security teams are advised to monitor for credential reuse attempts following exposure to this domain, as harvested credentials are likely to be exploited across multiple platforms. Additionally, the anomalous domain creation date (2026) should be used as a detection rule in domain monitoring tools to identify similarly suspicious registrations.