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

Static analysis result for SHA-256 715f9dc1efa5fca5…

MALICIOUS

Office (OLE) / .DOCX

195.6 KB Created: 2020-09-24 13:34:00 Authoring application: Microsoft Office Word
MD5: 7e07c90809ef4d1123af36078495ad33 SHA-1: 5c1a58f3c0efe963160a82cde1be694a6944ca85 SHA-256: 715f9dc1efa5fca591ca9ec3b12ea2cbfb023fdeb8f0964988c191a7be6166c8
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 a Document_Open macro that uses CreateObject to execute obfuscated code. This behavior is characteristic of macro-based downloaders. The ClamAV detection name 'Doc.Downloader.EmotetRed02224-9938637-0' further supports this assessment, indicating a downloader likely associated with the Emotet family, though specific attribution is not confirmed. The obfuscated nature of the VBA script suggests an attempt to deobfuscate and execute a secondary payload.

Heuristics 6

  • ClamAV: Doc.Downloader.EmotetRed02224-9938637-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed02224-9938637-0
  • 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
a837a74c15cb3b2b06d70805c30f06a3d350fde6faccbab7be73edc42a69bb80		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 25402 bytes

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