Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 7b664501734d9f55…

MALICIOUS

Office (OLE) / .DOCX

158.4 KB Created: 2020-10-20 04:30:00 Authoring application: Microsoft Office Word
MD5: a77fa8daf8f8eb61d2cfd964a4ce10ea SHA-1: c5137ec4b4cec7387e1f6ce03c79b672245002b3 SHA-256: 7b664501734d9f55316f7ffbd0178031b2b0501610f3065ada226a0a04e4e014
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The presence of a "Document_Open" macro and the "CreateObject" call strongly indicate malicious VBA execution. ClamAV detection as 'Doc.Downloader.Emotet' further supports this. The VBA script is heavily obfuscated but its structure and the heuristic firings suggest it is designed to download and execute a secondary payload, consistent with Emotet's behavior.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-9780400-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9780400-0
  • 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
bec182db065394791f950a49edfb2bfa66cb6693b62758841681c782964c8b6d		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 15615 bytes

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