Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 71dcb15f522c5a1f…

MALICIOUS

Office (OLE) / .DOCX

153.9 KB Created: 2020-10-19 12:20:00 Authoring application: Microsoft Office Word
MD5: 401af47983cf7c2f3247a08509f9a437 SHA-1: 84291d16fd19daa1aa487ce872d32e1542b0f74f SHA-256: 71dcb15f522c5a1f19fcc3fd50273a6c8b92ca7a574bad0fec00e1424b46e7c5
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample is a Microsoft Office document with VBA macros, specifically triggering a Document_Open macro. Heuristics indicate the use of CreateObject, a common technique for downloading and executing additional payloads. ClamAV detection explicitly identifies it as 'Doc.Downloader.Emotet-9780400-0', strongly suggesting the Emotet family and a downloader attack pattern. The VBA macro code, though obfuscated, contains calls to CreateObject, supporting the rationale that it's designed to fetch and run a secondary payload.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-9780400-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9780400-0
  • 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
1b934c7a6a945d183f556fc460816db0116e14a6233b4c84dca18770500f607e		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 15515 bytes

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