Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 7290f2718e2ac5b4…

MALICIOUS

Office (OLE) / .DOCX

288.6 KB Created: 2020-10-29 11:27:00 Authoring application: Microsoft Office Word
MD5: ec90dd4138f2db694d4168b8a05e53c1 SHA-1: f4af0a396bec06faaed2101808d77285d0f93977 SHA-256: 7290f2718e2ac5b4b432725bbc6fcb2c21cf548fd7df795451ab3553afa66ca4
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 to execute code. ClamAV identifies this as Doc.Downloader.EmotetRed02224-9938637-0, a known Emotet downloader variant. The VBA script is heavily obfuscated but its structure and the presence of a Document_Open auto-execution routine strongly suggest it is designed to download and execute a secondary payload.

Heuristics 6

  • ClamAV: Doc.Downloader.EmotetRed02224-9938637-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed02224-9938637-0
  • 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
898dac0a9fbba39aaf7a14ff7100c80bc81af6e0cb0f2cf6d397c84d46877d50		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18710 bytes

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