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Phishing attacks target Microsoft Office 365 (Image: Shutterstock).

New York based Avanan identified a new phishing outbreak, The NoRelationship Attack, that bypasses Office 365 email attachment security, which scan Office documents like Word (.docx), Excel (.xlsx), and PowerPoint (.pptx).

Avanan, which delivers a cloud security platform, described how the phishing attack bypasses Exchange Online Protection URL filters. The attack emails include a .docx attachment containing a malicious link that leads to a credential harvesting login page. Link parsers not scanning the full document, but instead depending on a relationship file for the list of links included in the attachment, fail to identify the malicious URL.

Roy Urrico

Roy W. Urrico specializes in articles about financial technology and services for Credit Union Times, as well as ghostwriting, copywriting, and case studies. Also: writer/editor of a semi-annual newsletter for Association for Financial Technology since 1997 and history projects funded by the U.S Interior Department, National Park Service and Warren County (N.Y.).

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