Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 66fb0ff0bc019411…

MALICIOUS

Office (OLE) / .DOCX

169.7 KB Created: 2020-09-22 22:50:00 Authoring application: Microsoft Office Word
MD5: 86f81b846848f4415d8e6d519234d6db SHA-1: 08b9e7913e36d3fb7f190f2b267b9ac592df0546 SHA-256: 66fb0ff0bc019411aae249302066f28d3d4a17f14d79cb2d743b4b3f86cd2e0d
242 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample is a malicious Office document containing VBA macros, specifically a Document_Open macro that is designed to execute. The ClamAV detection explicitly identifies it as 'Doc.Downloader.Emotet-9765458-0', strongly suggesting Emotet family involvement. The VBA code is heavily obfuscated, but the presence of CreateObject and GetObject calls, along with the auto-execution of the Document_open macro, indicates it's designed to download and execute a secondary payload. This aligns with typical Emotet infection chains.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-9765458-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9765458-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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
30f2d5537902d59450c9d0d4b8e76203b657840da56dd9d07c3c9632425ddcf4		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 20571 bytes

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