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

Static analysis result for SHA-256 76f66a11d08728de…

MALICIOUS

Office (OLE) / .DOCX

191.6 KB Created: 2020-09-18 12:16:00 Authoring application: Microsoft Office Word
MD5: b087a576b131ebbee718d893753eadda SHA-1: 9f7c064ef9a65fe0ea0fd109c23d78499f0d80f8 SHA-256: 76f66a11d08728dee802eecf204455949bbdc698324db7a9928595df63555401
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample is a Microsoft Office document containing VBA macros, specifically a Document_Open macro that uses CreateObject. This indicates an attempt to execute code automatically when the document is opened. The ClamAV detection as 'Doc.Downloader.Generic' strongly suggests the macro's purpose is to download a secondary payload. No specific family could be identified, but the behavior is consistent with a downloader.

Heuristics 6

  • ClamAV: Doc.Downloader.Generic-9763532-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9763532-0
  • 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
ba8241e4388725ade491e6e42da3e5f9cf169555b4f6e61ff9f624691af3445f		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 20213 bytes

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