Microsoft 365 OAuth device code phishing campaign
Campaign
Summary
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The OAuth device code phishing wave against Microsoft 365 accounts is expanding, raising the risk of account takeover across multiple sectors. Attackers are abusing Microsoft's legitimate device login flow to authorize attacker-controlled apps, which can grant access without stealing credentials or bypassing MFA. The activity has been growing since September 2025 and includes both TA2723 and UNK_AcademicFlare. The target set spans government, academic, think tank, and transportation organizations in the U.S. and Europe.
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Sources 1
About this happening:
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Kali365 Microsoft 365 device-code phishing campaign
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About this happening:
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Sources 1
About this happening:
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Campaign
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Sources 1
About this happening:
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Sources 1
About this happening:
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Code of conduct-themed Microsoft AiTM phishing campaign
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Timeline
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19.12.2025 19:19 2 articles · 5mo ago
Microsoft 365 OAuth device code phishing campaign
Initial DisclosureThe earliest visible phase used **document-sharing lures** and localized company branding to push victims into Microsoft's device-code login flow. Entering the code there authorized attacker access to the account.
Show sources
- Microsoft 365 accounts targeted in wave of OAuth phishing attacks — www.bleepingcomputer.com — 19.12.2025 19:19
- Microsoft 365 accounts targeted in wave of OAuth phishing attacks — www.bleepingcomputer.com — 19.12.2025 19:19