Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 043ddc738d360fc0…

MALICIOUS

Office (OLE) / .DOCX

165.4 KB Created: 2020-10-20 12:48:00 Authoring application: Microsoft Office Word
MD5: 409ca45cd0b04eadebd37c1dac9893c0 SHA-1: 57cb617df48097ada5875301826d50b98711d4b5 SHA-256: 043ddc738d360fc062c287e155eebb7b7cb64a9cd0cf30ce66cc07990c153e9b
202 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The file contains VBA macros, including a Document_Open auto-execution macro, which is a common technique for Emotet. The ClamAV detection explicitly identifies it as 'Doc.Downloader.Emotet'. The macro's primary function appears to be downloading and executing a second-stage payload, as indicated by the CreateObject calls and the overall structure of the obfuscated VBA code.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-9780849-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9780849-0
  • 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
a791bb7ba5242dbbc595d3114d3368d96d9feda91ba232c650f7097f210ce92c		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 17778 bytes

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