Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 18b87dafb2baba02…

MALICIOUS

Office (OLE) / .DOCX

154.9 KB Created: 2020-10-16 06:31:00 Authoring application: Microsoft Office Word
MD5: 7732f6bc600f6966cc550b5784ac6815 SHA-1: 2228cda502f99cd179b2ea45c393b08ed260a21c SHA-256: 18b87dafb2baba028eb4b73c0fa26e56c77d007dfaeaa33de5a7b45a5842a989
202 Risk Score

Malware Insights

Emotet · confidence 95%

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 executes automatically. Heuristics indicate the use of CreateObject and p-code auto-execution, consistent with malware downloaders. ClamAV detection explicitly identifies it as 'Doc.Downloader.Emotet-9778460-0'. The VBA script itself is heavily obfuscated but its structure and the presence of a Document_open subroutine strongly suggest it's designed to download and execute a secondary payload.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-9778460-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9778460-0
  • 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
d61a5c08d74b05c0be099936f48870810cfcd0fa95621c486c59e0d00fa9de51		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 15430 bytes

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