outlook-office365[.]ru

Analysis indicates that outlook-office365.ru is an active brand-impersonation domain targeting Microsoft, specifically designed to facilitate tech support scams. The domain was registered on February 16, 2023, through MASTERHOST-RU and remains operational as of July 23, 2026. Infrastructure analysis reveals the domain resolves to IP address 87.242.79.60, hosted within AS49063 (Data Storage Center JSC) in Russia. Nameservers are configured under Cloudflare (earl.ns.cloudflare.com and reza.ns.cloudflare.com), a common tactic to obscure hosting origins and enhance resilience against takedowns.

Detection metrics confirm malicious classification: the domain appears on one security blocklist (PhishDestroy) and is flagged by 19 of 95 security vendors in VirusTotal scans. AlienVault OTX records one threat intelligence pulse associated with this domain, while Gridinsoft assigns a trust score of 0/100, further corroborating its malicious nature. The domain returns an HTTP 200 status, indicating an active web server, and employs a Let's Encrypt SSL certificate (serial E7), which is frequently used in phishing campaigns to lend a false sense of legitimacy. Technical indicators include the use of Caddy as a web server, Mailgun for potential email-based attack vectors, and HTTP/3 for improved performance and evasion.

While the exact content of the site has not been analyzed, the domain's structure and naming convention strongly suggest an intent to deceive users into believing it is an official Microsoft service, specifically Outlook or Office 365. Defenders should treat this domain as high-risk and implement blocking measures at the DNS, proxy, or endpoint level. Monitoring for related domains registered through the same registrar or resolving to the same IP range may uncover additional threats in this campaign.