Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 70fb53e73b6f88f4…

MALICIOUS

Office (OLE) / .DOCX

125.2 KB Created: 2020-09-30 20:57:00 Authoring application: Microsoft Office Word
MD5: af5d821203e7dd115f417dd71e7ed699 SHA-1: 9482f3c98683e161b232f7f0cdbe382105e7af66 SHA-256: 70fb53e73b6f88f473daeff54fd683ca2520516013df40ed5446b86bfc4a097e
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 containing VBA macros, specifically a Document_Open macro designed to execute automatically. Heuristics indicate the use of CreateObject and p-code execution, consistent with Emotet's typical behavior. The VBA script is heavily obfuscated but appears to construct a URL for downloading a secondary payload.

Heuristics 6

  • ClamAV: Doc.Malware.Emotet-9769866-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9769866-1
  • 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
7cb9b8e5dcd6093fc36997f1ddba9977c3343a23efe112843f21e09b69e64d3a		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10245 bytes

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