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

Static analysis result for SHA-256 5cbb14d1979b0259…

MALICIOUS

Office (OLE) / .DOCX

234.2 KB Created: 2020-10-28 21:52:00 Authoring application: Microsoft Office Word
MD5: 89e1e9c8c83dbfdd3776269a89f7ec10 SHA-1: 38fcf92866a70b6c3a53b5502fcc5321a40e1735 SHA-256: 5cbb14d1979b0259be5131e9d92da0ea63751d263e0db5d2e3ddde47a74771c8
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 triggering a Document_Open auto-execution macro. The macros utilize CreateObject and obfuscated p-code, indicating an attempt to download and execute a secondary payload. ClamAV also detected it as a downloader. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose.

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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