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

Static analysis result for SHA-256 68388c6e9de3f96e…

MALICIOUS

Office (OLE) / .DOCX

179.7 KB Created: 2020-09-18 08:59:00 Authoring application: Microsoft Office Word
MD5: 767a7db891a538b5d8555e44e93de19f SHA-1: 5712c83e37680d9c440867e440d879a88d48c260 SHA-256: 68388c6e9de3f96e1a46baa9a6f0185dec5ce48b8a30d26e18c23161078e80f6
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 Word 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 'Doc.Downloader.Generic-9763419-0' strongly suggests the macro's purpose is to download a secondary payload. The VBA code itself is heavily obfuscated, making it difficult to determine the exact download URL or execution method.

Heuristics 6

  • ClamAV: Doc.Downloader.Generic-9763419-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9763419-0
  • 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
2cacffa870bc163e0d80063dbad890b2628b581c624e40730ba57a6c44f2b3d2		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 20834 bytes

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