Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 d7eeed720ac4e4af…

MALICIOUS

Office (OOXML)

10.1 KB Created: 2018-03-07 09:39:00 UTC Authoring application: Microsoft Office Word 12.0000
MD5: 801acd90bd56f3d64c4c691e86bf2c3a SHA-1: 00f7b6406fee87cfbac63cb708900a038861c791 SHA-256: d7eeed720ac4e4af2ba68588012e50e2cab259e46d3405026b75db93ce3a71e9
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as a malicious downloader by ClamAV. Heuristics indicate the presence of remote template injection and external relationships, both pointing to the URL https://ulvis.net/nk5. This suggests the document is designed to lure the user into downloading and executing a second-stage payload from this external source.

Heuristics 4

  • ClamAV: Doc.Downloader.Redline-9972754-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Redline-9972754-0
  • Remote template injection high OOXML_REMOTE_TEMPLATE
    Document references a remote template URL (https://ulvis.net/nk5) — a common remote-template-injection vector used by Hancitor, Emotet and many phishing campaigns. Word can fetch and apply the remote template; macros in that template may execute depending on Office policy and trust state.
  • External relationship medium OOXML_EXTERNAL_REL
    External target in word/_rels/webSettings.xml.rels: https://ulvis.net/nk5
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ulvis.net/nk5
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/officeDocument/2006/math
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
    • http://schemas.openxmlformats.org/wordprocessingml/2006/main
    • http://schemas.microsoft.com/office/word/2006/wordml

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