A new phishing campaign can bypass multi-factor authentication (MFA) on Office 365 to access victims’ data stored on the cloud and use it to extort a Bitcoin ransom or even find new victims to target, security researchers have found. Researchers at Cofense Phishing Defense Center discovered the tactic, which leverages the OAuth2 framework and OpenID Connect (OIDC) protocol and uses a malicious SharePoint link to trick users into granting permissions to a rogue application, researcher Elmer Hernandez wrote in a blog post published Tuesday.

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