allegro[.]3648f84-3f3[.]sbs

This domain, allegro.3648f84-3f3.sbs, is identified as a credential theft operation impersonating the Allegro marketplace platform. Analysis confirms the domain is currently offline, though prior activity involved harvesting user login credentials through deceptive login portals mimicking the legitimate Allegro service. The infrastructure was designed to exploit trust in the Allegro brand, a major e-commerce provider in Central and Eastern Europe. Infrastructure analysis reveals the domain was registered through Global Domain Group LLC on February 21, 2026, and resolves to the IP address 104.21.57.117, hosted on AS13335 (Cloudflare, Inc.). The domain appears on one security blocklist and is flagged by 21 of 95 security vendors on VirusTotal. Notably, the domain lacks an SSL certificate, a red flag for user security, as legitimate services typically enforce encrypted connections. Creation date anomalies and the absence of standard security measures further support the malicious classification. The domain has been taken offline, reducing immediate risk to users. However, organizations should monitor for residual threats, including phishing emails or redirects leading to similar infrastructure. Security teams are advised to block the domain and associated IP at the network level, update endpoint protection rules, and conduct user awareness training to recognize credential theft tactics. Historical indicators, such as the IP and registrar details, should be incorporated into threat intelligence feeds for proactive detection of related campaigns.