Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 7243a8b310732194…

MALICIOUS

Office (OLE) / .DOCX

175.4 KB Created: 2020-10-20 14:16:00 Authoring application: Microsoft Office Word
MD5: 8fa51631ca92399a2a0e86a97b88ccbf SHA-1: bb2e7961ffd92bad1e0554d6880f5595fec7204a SHA-256: 7243a8b310732194f108b07673f6cd3fa1f5dad347ada8ffc8bd59dce8e1dbdc
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample is identified as malicious by ClamAV with the signature Doc.Malware.Emotet-9781039-0. High-severity heuristics indicate the presence of VBA macros, specifically a Document_Open macro that utilizes CreateObject for execution. The VBA script itself is heavily obfuscated, but the Document_Open subroutine and the CreateObject heuristic strongly suggest it's designed to download and execute a secondary payload, a common Emotet tactic. The presence of the 'macros.bas' artifact further supports this.

Heuristics 6

  • ClamAV: Doc.Malware.Emotet-9781039-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9781039-0
  • 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
417a16a51c05c178612698fd783ed577ce9b3b76b7f937b9782e824861e12aec		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18804 bytes

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