b1gp-15sm-68bj[.]cnash-ymcainw-org-s-account[.]workers[.]dev

The domain b1gp-15sm-68bj.cnash-ymcainw-org-s-account.workers.dev is currently active and classified as a high-risk credential phishing threat targeting users of Microsoft 365 services. Analysis indicates the domain is designed to harvest login credentials by mimicking legitimate Microsoft authentication portals, a tactic commonly employed in targeted phishing campaigns. The domain remains operational and exhibits no signs of takedown or mitigation as of the latest assessment. Infrastructure analysis reveals the domain is registered through Cloudflare, Inc., and resolves to the IP address 104.21.14.245, which is geolocated in the United States under AS13335 (Cloudflare, Inc.). The domain is secured with an SSL certificate issued by Let's Encrypt (serial number E8), a common practice among threat actors to lend legitimacy to phishing sites. Detection metrics indicate the domain has been flagged by 14 of 95 security vendors on VirusTotal, while it appears on one security blocklist. The domain's hosting on Cloudflare Workers infrastructure further complicates attribution and takedown efforts, as it leverages a legitimate content delivery network to obfuscate malicious activity. Current threat assessment confirms the domain remains active and poses a significant risk to users and organizations relying on Microsoft 365 services. Immediate mitigation steps include blocking the domain and its associated IP address (104.21.14.245) at the network perimeter, as well as implementing email filtering rules to prevent delivery of messages containing this domain. Security teams are advised to monitor for indicators of compromise, including unauthorized access attempts or anomalous login activity originating from this domain. End-user training should emphasize the risks of credential phishing, particularly for cloud-based services, and encourage verification of domain authenticity before entering sensitive information.