Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 15c109de6cc4acd8…

MALICIOUS

Office (OLE) / .DOCX

173.6 KB Created: 2020-10-20 14:16:00 Authoring application: Microsoft Office Word
MD5: 98eb58d91979c7d18a4fd4353f2d9b5d SHA-1: 9070657066e90b50428b754e6711f9bb38af1bfb SHA-256: 15c109de6cc4acd8526fc63694f325867292228995c301378b9de3f144b311dd
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample is a DOCX file containing a VBA macro that executes upon opening the document. The macro is heavily obfuscated but the presence of CreateObject and the Document_Open auto-execution indicate malicious intent. ClamAV detection and heuristic firings strongly suggest the Emotet family, which commonly uses this technique to download further malware. The embedded VBA macro 'macros.bas' is the primary artifact.

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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