Malicious Office (OOXML) / .DOC — malware analysis report

Static analysis result for SHA-256 dae4ad534347f040…

MALICIOUS

Office (OOXML) / .DOC

383.6 KB Created: 2022-04-01 04:33:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2022-04-08
MD5: 8f00e2024177bffa0a429434098fea08 SHA-1: 26331d7d45249c796fe1c0154147da7f24189dff SHA-256: dae4ad534347f040c304877720268ec4cd5e4e5f4cb0e79b64a658d534989939
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.005 Visual Basic

The critical heuristic 'OFFICE_EMBEDDED_MACRO_OBJECT' indicates that the document contains an embedded OOXML object which carries a VBA macro project. This macro project is associated with the URL https://www.mediafire.com/file/25xv4x5708bbi1m/main.htm/file, strongly suggesting it is used to download and execute a second-stage payload. The presence of an embedded OLE object further supports this malicious intent.

Heuristics 3

  • Embedded Office object carries macros critical OFFICE_EMBEDDED_MACRO_OBJECT
    This document embeds a second Office file that itself contains a VBA macro project or an Excel 4.0 (XLM) macro sheet. Hiding a macro-bearing workbook or document inside another document — frequently under an obfuscated, non-standard part name — is a macro-smuggling technique that defeats scanners which only inspect the outer document's macro storage. No benign authoring workflow stages a hidden macro project this way.
  • Embedded OLE object medium OOXML_OLE_OBJECT
    Document contains an embedded OLE object
  • 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://www.mediafire.com/file/25xv4x5708bbi1m/main.htm/file
    • http://schemas.microsoft.com/office/word/2010/wordprocessingCanvas
    • http://schemas.microsoft.com/office/drawing/2014/chartex
    • http://schemas.microsoft.com/office/drawing/2015/9/8/chartex
    • http://schemas.microsoft.com/office/drawing/2015/10/21/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/9/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/10/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/11/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/12/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/13/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/14/chartex
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.microsoft.com/office/drawing/2016/ink
    • http://schemas.microsoft.com/office/drawing/2017/model3d
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/officeDocument/2006/math
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
    • http://schemas.openxmlformats.org/wordprocessingml/2006/main
    • http://schemas.microsoft.com/office/word/2010/wordml
    • http://schemas.microsoft.com/office/word/2012/wordml
    • http://schemas.microsoft.com/office/word/2018/wordml/cex
    • http://schemas.microsoft.com/office/word/2016/wordml/cid
    • http://schemas.microsoft.com/office/word/2018/wordml
    • http://schemas.microsoft.com/office/word/2020/wordml/sdtdatahash
    • http://schemas.microsoft.com/office/word/2015/wordml/symex
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroup
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInk
    • http://schemas.microsoft.com/office/word/2006/wordml
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShape

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
8d564ecaff19813b9d66edba88fb11ae70650bc4141c9ebb25bffbab98324836		 ooxml-ole-object OOXML embedded OLE part: word/embeddings/Microsoft_Excel_Macro-Enabled_Worksheet1.xlsm 16505 bytes
ooxml_oleobject_01.bin
5125776a9a11ae947efdaa7a2c8455a9118326b2e01dfd968c74194e6661836e		 ooxml-ole-object OOXML embedded OLE part: word/embeddings/Microsoft_Excel_Macro-Enabled_Worksheet.xlsm 16512 bytes
emf_00.emf
ec74c1ac1cdf6264c476a64da7a349acdaadbdea7d19cb054ce3684213b97dc7		 ooxml-emf OOXML EMF part: word/media/image3.emf 4156 bytes

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