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Threat Actors Abuse Railway.com PaaS as Microsoft 365 Token Attack Infrastructure

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Threat Actors Abuse Railway.com PaaS as Microsoft 365 Token Attack Infrastructure

Threat actors are exploiting Railway, a Platform-as-a-Service (PaaS) offering, as infrastructure to replay stolen Microsoft 365 tokens in attacks targeting hundreds of organizations. The campaign combines adversary-in-the-middle (AiTM) tactics and device code phishing to compromise credentials across a large number of Microsoft 365 tenants and managed service providers (MSPs).

Why it matters: Organizations using Microsoft 365 and MSPs face direct risk from token replay attacks; practitioners should review authentication logs for suspicious token usage and consider disabling legacy authentication and device code flows where possible.

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Correction recorded as of .

threat intel

Threat Actors Abuse Railway.com PaaS as Microsoft 365 Token Attack Infrastructure

Threat actors are exploiting Railway, a Platform-as-a-Service (PaaS) offering, as infrastructure to replay stolen Microsoft 365 tokens in attacks targeting hundreds of organizations. The campaign combines adversary-in-the-middle (AiTM) tactics and device code phishing to compromise credentials across a large number of Microsoft 365 tenants and managed service providers (MSPs).

Why it matters: Organizations using Microsoft 365 and MSPs face direct risk from token replay attacks; practitioners should review authentication logs for suspicious token usage and consider disabling legacy authentication and device code flows where possible.

VendorsMicrosoft
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