Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 b5d213a1631d12db…

MALICIOUS

Office (OOXML)

10.1 KB Created: 2018-03-07 09:39:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2021-05-23
MD5: 23f355fe9befe3097a2713f75abed6d0 SHA-1: 1fd7ef1725b11f3166cd3460159340e2508d2ce1 SHA-256: b5d213a1631d12db9ead4d93c08a469993aeec252ee06660568e31cc36d4ea28
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file contains heuristics indicating remote template injection and external relationship usage, pointing to a malicious document. The embedded URLs, specifically http://192.3.22.5/.-...........................................................................................-/.-...........................wbk, are highly suspicious and likely serve as a download source for a secondary payload. ClamAV detection as Doc.Downloader.Redline-9972754-0 further supports the malicious nature of this file.

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 (http://192.3.22.5/.-...........................................................................................-/...........................) — 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: http://192.3.22.5/.-...........................................................................................-/.......
  • 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 http://192.3.22.5/.-...........................................................................................-/ Remote template reference
    • http://192.3.22.5/.-...........................................................................................-/...........................wbkRemote template reference
    • http://schemas.openxmlformats.org/markup-compatibility/2006In document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/mathIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/wordprocessingml/2006/mainIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)

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