216.73.216.6

Token Bingo: Don't Let Your Code be the Winner

· Published 25/04/2026 13:35 · Modified 27/04/2026 14:57

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Essential information

Published
25/04/2026 13:35
Modified
27/04/2026 14:57
Tags
2026-04-25 credential-theft device code phishing inbox rules kali365 microsoft 365 oauth abuse phishing-as-a-service token theft
Related entities
5 observables, 1 malware, 9 others

Description

In early April 2026, a large-scale campaign targeted organizations across multiple sectors and regions, exploiting OAuth 2.0 Device Authorization Grant. Threat actors leveraged the platform, originating primarily from IP address 216.203.20[.]95. The campaign used high-fidelity lures directing victims to Microsoft's legitimate device login flow, where users unknowingly authorized threat actor-controlled sessions. Captured OAuth tokens enabled immediate mailbox access and post-compromise activities. In some cases, attackers established malicious to suppress security notifications, extending dwell time. The platform operates as a multi-tenant PhaaS ecosystem supporting both device code abuse and adversary-in-the-middle session capture, featuring rapid lure generation across multiple languages and file types, Cloudflare Worker-hosted pages, and token sharing capabilities between affiliates.

External references