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

Static analysis result for SHA-256 11f1815179241d0f…

MALICIOUS

Office (OLE) / .DOCX

140.5 KB Created: 2021-01-25 09:18:00 Authoring application: Microsoft Office Word
MD5: 3e920f73bd01f7f2bc523365586cb1a6 SHA-1: c8b23cb6c337de253f9260bfb9448842fca79634 SHA-256: 11f1815179241d0f4acf9c2e9a9bc84ce4aa2e7c3a4f88ad6e40af2471db5d2e
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample is a Microsoft Office document containing VBA macros, specifically a Document_Open macro that uses GetObject. This indicates an attempt to execute malicious code when the document is opened. The ClamAV detection name 'Doc.Malware.Valyria-10034158-0' further supports its malicious nature. The VBA code appears obfuscated but the presence of auto-execution macros strongly suggests it's designed to download and run a second-stage payload, fitting the pattern of a spearphishing attachment.

Heuristics 6

  • ClamAV: Doc.Malware.Valyria-10034158-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Valyria-10034158-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • 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.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
2b8afd212b0a2ad26a917e5368163e3c32e5256aa102f773d94d8a58600b403d		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 8473 bytes

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