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

Static analysis result for SHA-256 3279e5263da524c5…

MALICIOUS

Office (OOXML) / .DOC

176.3 KB Created: 2021-09-14 18:10:00 UTC Authoring application: Microsoft Office Word 12.0000
MD5: 04670f5a8935de069f0586f237b80a15 SHA-1: 55f79e8d8ffec65081411b1a2495609adc098702 SHA-256: 3279e5263da524c55ce9b98581150764baa7f330b4c8a309a9c96c9f8ae2ba17
82 Risk Score

Malware Insights

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

The file is a Word document containing an embedded OLE object, specifically a macro-enabled Excel worksheet. This embedded object is flagged as critical, indicating it carries a VBA macro project. The heuristic also directly extracts a payload URL from this object: https://www.bitly.com/jasdojasdokkaodksdaksd. This suggests the document's primary purpose is to lure the user into opening the embedded object, which then likely executes the macro to download and run a second-stage payload from the provided URL.

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 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
    • https://www.bitly.com/jasdojasdokkaodksdaksd

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
d4f6be908446a2fa85f0a1b6565696a6a7ab19670e008692b1786b16afddcec0		 ooxml-ole-object OOXML embedded OLE part: word/embeddings/Microsoft_Office_Excel_Macro-Enabled_Worksheet3.xlsm 20126 bytes

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