Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 03ff9a42c249d446…

MALICIOUS

Office (OLE) / .DOCX

154.5 KB Created: 2020-10-16 06:31:00 Authoring application: Microsoft Office Word
MD5: 35ac95d80c5739f52174a0e2841cfba3 SHA-1: 3395a002664ac960da3132ef2040815e50c1e02f SHA-256: 03ff9a42c249d4467a8172901799dee26bf14d4330de825ff53b6abef83a7d51
202 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample is a Microsoft Office document containing VBA macros, specifically a Document_Open auto-execution macro. Heuristics indicate the use of CreateObject and p-code execution, typical of malware downloaders. ClamAV detection explicitly identifies it as 'Doc.Downloader.Emotet-9778460-0', strongly suggesting the Emotet family. The VBA macro itself is heavily obfuscated but its presence and execution context point to it downloading and executing 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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