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

Static analysis result for SHA-256 bfcc1b289f6a1e86…

MALICIOUS

Office (OOXML) / .DOC

136.9 KB Created: 2021-02-24 08:53:00 UTC Authoring application: Microsoft Office Word 15.0000
MD5: 52e62d44477cdd6a68b2b23dd710af49 SHA-1: dda04a739728a078fb85e42561812e91f0481e00 SHA-256: bfcc1b289f6a1e86123475b204b7edc934e9bc902d50c41607bb8879be7ea39f
100 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell

The OOXML document contains VBA macros, specifically a Document_Open macro, which is a common technique for executing malicious code upon opening. The presence of a GetObject call further suggests code execution. The embedded script, though truncated, appears to be PowerShell code that gathers system information and potentially executes commands, indicating a downloader or initial access payload. The confidence is slightly reduced due to the truncated nature of the script.

Heuristics 4

  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • 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.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/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
195f473ac7c066a13235ab29f6b7664a0c7561cd25ee87a1bae6a1d37d448f09		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2573 bytes
vbaProject_00.bin
69fd7ee9ea94a83f61fd1355e0e6d8ed5b430179e796095f1c1fbfba8407ed08		 vba-project OOXML VBA project: word/vbaProject.bin 14336 bytes

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