Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 04087a4a4bb61e7f…

MALICIOUS

Office (OLE) / .DOCX

163.9 KB Created: 2020-09-22 18:24:00 Authoring application: Microsoft Office Word
MD5: 444994de26bc07e0ad12ac368de4e8d0 SHA-1: 68588e08030ed104ed66a345d55b553254c5208c SHA-256: 04087a4a4bb61e7f81ef96d89e29efed54b189a7821d5424c2d7d9443ecf56f4
242 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample contains VBA macros, including a Document_Open auto-execution macro, which is a common characteristic of Emotet. The ClamAV detection explicitly identifies it as 'Doc.Downloader.Emotet'. The VBA code appears to be obfuscated but the presence of CreateObject and GetObject calls, along with the auto-execution of the Document_open subroutine, strongly suggests it's designed to download and execute a secondary payload. The embedded URL is benign, but the macro itself is the primary indicator of malicious activity.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-9765458-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9765458-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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
bd654d20c055e0b0e127587789558080b1c423748b3142eb9ab3aa76d6d97f9b		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 20393 bytes

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