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

Static analysis result for SHA-256 5c91b9dff81808ba…

MALICIOUS

Office (OLE) / .DOCX

234.4 KB Created: 2020-10-28 21:52:00 Authoring application: Microsoft Office Word
MD5: cfd948cd1d182c034fc365eb3789d96f SHA-1: 91b6605a893337ff0ac182adcebe1e6e81f09d79 SHA-256: 5c91b9dff81808ba1ba3d21fa9c6ec57d09922af1cfd7ae5d06aef031eee5f11
202 Risk Score

Malware Insights

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

The file is a DOCX document containing VBA macros, including a Document_Open macro that uses CreateObject. This indicates a malicious downloader. The ClamAV heuristic also flags it as a downloader. No specific family could be identified, but the presence of VBA macros suggests it was likely delivered as a spearphishing attachment.

Heuristics 6

  • ClamAV: Doc.Downloader.Generic-9785156-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9785156-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject 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
5aa3aad97a35a46de04017100e8aadce01daec323c971d220dcadfd4335841c1		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18882 bytes

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