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

Static analysis result for SHA-256 6f6ac4df5dc7b2be…

MALICIOUS

Office (OLE) / .DOCX

235.1 KB Created: 2020-10-28 21:52:00 Authoring application: Microsoft Office Word
MD5: 0e0470a793fb41372f42b0b830f8ef4c SHA-1: 88c33cc71525b86983b72a2ec4639bfc513fe8b2 SHA-256: 6f6ac4df5dc7b2becdee67c23b92c4f95ab01ac73b08db24c2b4b811a9cbe55c
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information

The sample is a Microsoft Office document containing VBA macros, specifically triggering a Document_Open macro and using CreateObject, which are common indicators of malicious activity. The ClamAV detection further supports its malicious nature. The VBA script is heavily obfuscated, but its structure suggests it is designed to download and execute a secondary payload, consistent with a downloader malware.

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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