Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 0537a8b60f70cff3…

MALICIOUS

Office (OLE) / .DOCX

168.3 KB Created: 2020-09-28 19:59:00 Authoring application: Microsoft Office Word
MD5: be9bf1dbe7f19727d7854de2603fb5be SHA-1: 4f634d5ef0ccf56306cf756d08036efa9180fc69 SHA-256: 0537a8b60f70cff3524ae128de8c36be3e5c5d546657bc22795e8e8b2e1a02e8
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample was detected as malicious by ClamAV with the signature 'Doc.Malware.Emotet-9768661-0', strongly indicating the Emotet family. High-severity heuristics confirm the presence of VBA macros, specifically a Document_Open auto-execution macro that uses CreateObject. The VBA script is heavily obfuscated but appears to construct a string and then execute it, a common technique for downloading and running further malicious content. The document body is filled with what appears to be obfuscated or junk data, further supporting the malicious nature of the file.

Heuristics 6

  • ClamAV: Doc.Malware.Emotet-9768661-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9768661-0
  • 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
387c5ef7909231ea8caee5f9881fb86538a4be7f74672ee227b824bdfa4a7d92		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6701 bytes

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