Trend Micro identified an in-the-wild sample that attackers use the method to deliver the Ursnif Malware variant. The flaw affects Microsoft Word 2013 and later versions. The main goal of the URSNIF malware is to steal information including System information. Users can defend the attack by blocking word documents containing the tag: embeddedHtml in the Document.xml file of the word documents and to block word documents with an embedded video. Users can also block word document.”]
Source: https://gbhackers.com/hackers-abuse-online-video-feature-malware/