Researchers say a phishing service called ARToken is tied to the EvilTokens platform and is being used to break into Microsoft 365 accounts and steal long-lived access tokens. Cisco Talos found a React-based ARToken management panel with more than 80 API endpoints, including the same Microsoft OAuth 2.0 device-code phishing and Primary Refresh Token (PRT) workflows previously linked to EvilTokens. The toolkit can access Outlook, SharePoint, and OneDrive, create inbox rules, send mail from victim accounts, and deploy phishing infrastructure through Cloudflare Workers.
Why it matters: This matters because the attacks use Microsoft's legitimate device login flow, which can trick users into handing over access even when multi-factor authentication is enabled. Organizations using Microsoft 365 should urgently review device-code sign-in activity, tighten controls around OAuth and token use, monitor for suspicious inbox rules and mail forwarding, and warn users about unexpected prompts to enter device codes.
Lawrence Abrams
2026.07.03
100% relevant
This article establishes a distinct tracked story by adding new technical reporting on ARToken as an apparent EvilTokens affiliate platform, with concrete details about its Microsoft 365 token theft, persistence, and BEC automation capabilities.
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