Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 7512e266ad38f56f…

MALICIOUS

Office (OLE) / .DOCX

189.0 KB Created: 2020-10-21 20:47:00 Authoring application: Microsoft Office Word
MD5: dfe1f44b52a9d66f5a3398f700ed41a9 SHA-1: 1827f3b231c7996a6fb5aacae59822a6593a11cd SHA-256: 7512e266ad38f56ffe78e660347c98f0decf6bb495e53125976d71042800b3f4
202 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information

The sample is identified as a malicious Office document by ClamAV, specifically 'Doc.Dropper.EmotetiBlueUpdate1020-9780531-0'. It contains a VBA macro that is automatically executed via the Document_open subroutine. This macro utilizes CreateObject, a common technique for executing malicious code, and is heavily obfuscated, suggesting an intent to deobfuscate and execute a payload. The presence of a Document_Open macro and the CreateObject call strongly indicate a dropper functionality.

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
de68eb219c86c839b194b174abd2b170f818ab76547e269289797596310c601e		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 23214 bytes

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