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

Static analysis result for SHA-256 94b3ff23f3e9d87b…

MALICIOUS

Office (OOXML) / .DOC

54.1 KB Created: 2021-01-03 10:30:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: d95c8cdb5f276640aeb1f1401844202c SHA-1: 7ecfce08154811ecc6ebfd27d9febf2f3fba51ee SHA-256: 94b3ff23f3e9d87bf65c0bfd30764921b7d2c4778001b8b559495e2db21ec235
100 Risk Score

Malware Insights

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

The sample contains VBA macros, including a Document_Open macro, which is a common technique for executing malicious code upon opening the document. The script attempts to download a file from a bitbucket URL and save it as 'c4ggzqbku zrdwo.exe' in the temporary directory, likely to execute a second-stage payload. The GetObject call further suggests dynamic code execution.

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.microsoft.com/office/drawing/2014/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
ed83ef826fc7b99cccfb9ea7663233914cb8970ad28ce16e5623f1aef9dd098d		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 9272 bytes
vbaProject_00.bin
42dce3f3323e1ccfde101e0d5a1e0d655832cb899775ab3a77b689628b734f7f		 vba-project OOXML VBA project: word/vbaProject.bin 32256 bytes

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