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

Static analysis result for SHA-256 8a7b041f69625be3…

MALICIOUS

Office (OOXML) / .DOCX

18.5 KB Created: 2020-04-03 10:31:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 099f7ccfa73d5e0a6e54376d325ee0e3 SHA-1: 3b8f3c921fa7988ecffcd9ab9ba6dde34f85f6c7 SHA-256: 8a7b041f69625be377710ee7290cb01122a026b8f7772ee1d0cfaa8c93551808
120 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The OOXML document contains a VBA project with an AutoOpen macro, indicating malicious intent. The critical heuristic firing for URLDownloadToFile in VBA confirms that the macro attempts to download a payload from a remote source. This is a common technique for delivering secondary malware payloads. No specific family could be identified from the available evidence.

Heuristics 4

  • URLDownloadToFile in VBA critical OLE_VBA_DOWNLOAD
    URLDownloadToFile in VBA
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • VBA project inside OOXML medium OOXML_VBA
    Document contains vbaProject.bin — VBA macros present
  • 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
    • http://schemas.microsoft.com/office/drawing/2014/chartex
    • http://schemas.microsoft.com/office/drawing/2015/9/8/chartex
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • 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/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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
ffbf7bdb7515eeca118e34858126de777133006ee5c14177c87f9900e865b6ad		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 3756 bytes
vbaProject_00.bin
2fdc856ae3ce68cd4e7603fcd9f7e1c13b2c6df123263dbd45eb6a63eefdadee		 vba-project OOXML VBA project: word/vbaProject.bin 15360 bytes

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