Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 0bffbb268223d255…

MALICIOUS

Office (OLE) / .DOCX

130.8 KB Created: 2020-09-29 22:12:00 Authoring application: Microsoft Office Word
MD5: fac7e6c23589e54f523e0375a63b85b5 SHA-1: 60831290fc166a12d6826b5f85ff21972f30cf39 SHA-256: 0bffbb268223d255d4ebdcee53bd0d8e990843600bf96f811f47a550d1e366ca
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 is identified as malicious by ClamAV with the signature Doc.Downloader.Emotet-9769437-0, indicating it belongs to the Emotet family. Static analysis revealed the presence of VBA macros, specifically a Document_Open macro that utilizes CreateObject to execute code. This macro is likely responsible for downloading and executing a secondary payload, a common tactic for Emotet. The obfuscated nature of the script prevents a precise reconstruction of the download URL or execution command.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-9769437-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9769437-0
  • 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
46ea4f5c4c1cab321c0ffaa5340d45e7ba78bb5fcec47c12e0336c19b81c43df		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10333 bytes

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