Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 103af5341afa01bc…

MALICIOUS

Office (OLE) / .DOCX

129.5 KB Created: 2020-10-14 12:13:00 Authoring application: Microsoft Office Word
MD5: 3d8a4211f8b6cc2ad8282940955c9a84 SHA-1: 6af1fda39f1dc275b2cf918cbd768e0168d483eb SHA-256: 103af5341afa01bcab6cda409017d87b2c7d0e9bb7f2c290f67e845502f8f84e
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample contains a VBA macro that is automatically executed upon opening the document, as indicated by the 'Document_Open' macro and 'CreateObject' call heuristics. The ClamAV detection explicitly identifies it as 'Doc.Downloader.Emotet-9778018-0', strongly suggesting Emotet family. The macro's primary function appears to be downloading and executing a secondary payload, a common Emotet tactic.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-9778018-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9778018-0
  • 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
9ff2f6164d63cd97fef8963d2b7a6ca348ed28032df5d8d3d018a1f3d500bd9b		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 9476 bytes

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