Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 bb167670d5c0d936…

MALICIOUS

Office (OOXML)

18.84 MB Created: 2020-11-12 14:40:00 UTC Authoring application: Microsoft Office Word 14.0000 First seen: 2020-12-25
MD5: 35af87f45188ee232a2c32cd44cf2b55 SHA-1: 1ff619564fd6c2373fe7146751c2ee5519bc5430 SHA-256: bb167670d5c0d93621192afcdad155cbc6b5b66f645556cb90b1d6faa4e7eab5
82 Risk Score

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.microsoft.com/office/word/2010/wordprocessingCanvas In document text (OOXML body / shared strings)
    • 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.microsoft.com/office/word/2010/wordprocessingDrawingIn 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/2010/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroupIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInkIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShapeIn document text (OOXML body / shared strings)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin ooxml-ole-object OOXML embedded OLE part: word/embeddings/Microsoft_Excel_Macro-Enabled_Worksheet1.xlsm 6547956 bytes
SHA-256: 0a6c141b7ee1920087dff8e6d1e845e268eca5405386df638cf855997272c71b
emf_00.emf ooxml-emf OOXML EMF part: word/media/image2.emf 5508 bytes
SHA-256: eddfc8b7716a9a675db66becb42b29b0e34065bdd170c78ba25dff100489ef3e
emf_01.emf ooxml-emf OOXML EMF part: word/media/image1.emf 5500 bytes
SHA-256: 905a03a4ca16838cba46c6f26238a66bbc0d5e039e1aaf09fc5d4d8aa654be1f
emf_02.emf ooxml-emf OOXML EMF part: word/media/image3.emf 5508 bytes
SHA-256: 4f49a9fd69ff22752b827f2f864671551a92fbfe771642b38ac701dac892f5ac