Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 5f38c1fbef4f42be…

MALICIOUS

Office (OLE) / .DOCX

177.9 KB Created: 2020-09-18 13:57:00 Authoring application: Microsoft Office Word
MD5: 0175ea17f3aefbd202f92c61ec7bb0f2 SHA-1: d8b0968b30d7028c47e567ecd72a8d2a5a87887a SHA-256: 5f38c1fbef4f42be0184fb63effb0a6d953cbb55009cae9ade7e21c580ace133
202 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file is identified as malicious by ClamAV with the signature Doc.Downloader.Emotet-9763587-0. High-severity heuristics indicate the presence of VBA macros, specifically a Document_Open macro that uses CreateObject, suggesting it's designed to execute automatically. The macro code, though obfuscated, appears to be constructing strings and likely aims to download and execute a secondary payload, consistent with Emotet's behavior.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-9763587-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9763587-0
  • 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
d480f4e62437f12b4fdbfa09699c3791dd8e97ee1633f946eb76ef39a2f5d3e4		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 20121 bytes

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