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

Static analysis result for SHA-256 6f587af9bf1d3fd4…

MALICIOUS

Office (OLE) / .DOCX

218.5 KB Created: 2020-10-28 16:03:00 Authoring application: Microsoft Office Word
MD5: c5dc0eae3a5b492640d5d0e8b7490577 SHA-1: effec5a9d65a54e5a5f58d2e559f4a91c92c1c5d SHA-256: 6f587af9bf1d3fd4e20091fbeeff179d6280cc928c2e02857eb954aa37c7de98
202 Risk Score

Malware Insights

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

The file is a Microsoft Office document containing VBA macros, specifically a Document_Open macro that uses CreateObject. The macros appear to be heavily obfuscated, with functions designed to replace specific text patterns. This behavior is characteristic of malware designed to download and execute further stages. The ClamAV detection further supports its malicious nature.

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
432b4517275395423e4145d722d6a456d77df175cda38550f4e26528858e8adb		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18870 bytes

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