Organizations all over the world have been alerted to an increase in attacks that use Microsoft OneNote documents to spread malware.
OneNote, a component of the Office suite, is frequently used in businesses for note-taking and task management, among other things. OneNote documents are a desirable target for threat actors because they lack Mark-of-the-Web (MOTW) protection and because they can be attached to OneNote notebooks and then executed with little to no notification.
Security experts cautioned in August of last year that because MOTW was not applied to OneNote attachments, existing safeguards could be circumvented by using unsigned executables or documents with macro functionality.
Read More: Microsoft OneNote Abuse for Malware Delivery Surges
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