Doc.Trojan.Maldade-10036492-0 — Office (OOXML) malware analysis

Static analysis result for SHA-256 d881a965b92d55f3…

MALICIOUS

Office (OOXML)

19.3 KB Created: 2021-06-26 07:06:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2021-07-02
MD5: 8d4e319917b76ee8f38f91fe38ac1975 SHA-1: af9e22749956b9ccaa667f4de4e004263cfb0ce3 SHA-256: d881a965b92d55f361d7eaea209a72c7ffdffcad926409766594313032f16f0e
182 Risk Score

Malware Insights

Doc.Trojan.Maldade-10036492-0 · confidence 95%

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

The file is identified as malicious by ClamAV with the signature Doc.Trojan.Maldade-10036492-0. Static analysis revealed the presence of VBA macros, specifically an Auto_Open subroutine that executes a shell command. This indicates the document is designed to download and execute a secondary payload, a common tactic for malware distribution.

Heuristics 4

  • ClamAV: Doc.Trojan.Maldade-10036492-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Maldade-10036492-0
  • VBA project inside OOXML medium 1 related finding OOXML_VBA
    Document contains a VBA project — VBA macros present
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • 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.microsoft.com/office/drawing/2014/chartexIn 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/2012/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2015/wordml/symexIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 84 bytes
SHA-256: 3242813c0aec8f7d5a5717c3a79a65e1d01b3c0a3dc3a4b0eaffd61569e38909
Preview script
First 1,000 lines of the extracted script
Sub Hello()
Dim X
X=MsgBox("Hello VBS")
Sub Hello()
Dim X
X=MsgBox("Hello VBS")
vbaProject_00.bin vba-project OOXML VBA project: word/vbaProject.bin 10752 bytes
SHA-256: 03c7723a01cb1e1cf603f46aef9d2b8f20cf43a6d9cbc92cc316eae5f0edfc5e
Detection
ClamAV: Doc.Trojan.Maldade-10036492-0
Obfuscation or payload: unlikely

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