Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 665e6d41d9f3986a…

MALICIOUS

Office (OLE) / .DOCX

177.1 KB Created: 2020-09-18 13:57:00 Authoring application: Microsoft Office Word
MD5: 2cdc4171d554436488a75fe64a7b9fdb SHA-1: 566e743f0daea56460a0ac5af3fc68d3e5300ca8 SHA-256: 665e6d41d9f3986a71b02da9888ec9a5eeb00da227377007e6f3df8c0a703466
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The file is a Microsoft Office document containing VBA macros, specifically a Document_Open macro that uses CreateObject. ClamAV detection identifies it as 'Doc.Downloader.Emotet-9763587-0', strongly suggesting Emotet family. The VBA macro's structure and the heuristic firings indicate it's designed to execute code, likely downloading a secondary payload, which is a common Emotet tactic. The presence of the 'macros.bas' artifact and the ClamAV signature are the primary IOCs.

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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