Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 7335c78d724a78f4…

MALICIOUS

Office (OLE) / .DOCX

199.5 KB Created: 2020-10-21 21:54:00 Authoring application: Microsoft Office Word
MD5: 07ecfa9732155943b25d3c66b205c164 SHA-1: 272fb4fab737329d53207fd2788725d52752b97a SHA-256: 7335c78d724a78f44f7c6435833ea58c0ce402352d43a74be69ea9cabc29b0ec
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The file is identified as malicious by ClamAV with a specific Emotet variant name. Heuristics indicate the presence of VBA macros, specifically a Document_Open macro that uses CreateObject, suggesting an automated execution of malicious code upon opening. The VBA script is heavily obfuscated but its structure and the presence of macro execution tokens point towards a dropper functionality, likely to download and execute a secondary payload.

Heuristics 6

  • ClamAV: Doc.Dropper.EmotetiBlueUpdate1020-9780531-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.EmotetiBlueUpdate1020-9780531-0
  • 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
6c391991df0deaab71158b56a42728fa6cc0fa0f9cdacd00457125ab6d1e3e9d		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 23148 bytes

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