Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 14e39acf384b4f3a…

MALICIOUS

Office (OLE) / .DOCX

142.4 KB Created: 2020-09-29 09:08:00 Authoring application: Microsoft Office Word
MD5: 2d844c0adff32b8203ffcc351baf36d5 SHA-1: a98097703ad6613af7da676b48046b7fc021f176 SHA-256: 14e39acf384b4f3ae83ab61b0768b7ac4869961c6308d694a8455e064cf0358f
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 identified as malicious by ClamAV with the signature 'Doc.Downloader.Emotet-9769137-0', strongly indicating the Emotet family. High-severity heuristics confirm the presence of VBA macros, specifically a 'Document_Open' macro that utilizes 'CreateObject' for execution. The VBA script itself is heavily obfuscated with mathematical functions and repeated code blocks, suggesting an attempt to hide its true functionality, which is likely to download and execute a secondary payload. The presence of an embedded URL, though benign in this specific case, is typical for downloader malware.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-9769137-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9769137-0
  • 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
2f5b3223d32b6b79c027453efef3c5410c27df5205b9cb2b32dd9a1e0304e007		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 8132 bytes

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