Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 13e88cb0531b6aa5…

MALICIOUS

Office (OLE) / .DOCX

167.5 KB Created: 2020-10-26 10:57:00 Authoring application: Microsoft Office Word
MD5: c6ecf8bb24d43563ac906d8d47046783 SHA-1: 7d91bdedb5cf3eacb0a04061eee1d52d3ce99c0b SHA-256: 13e88cb0531b6aa50e377b366ea172183d59ea40224f08de97fb1b979dd60f32
202 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 Emotet infection vector. The macro uses CreateObject to execute obfuscated VBA code. ClamAV also identifies the file as Doc.Downloader.Emotet. The VBA script's primary function appears to be downloading and executing a second-stage payload, indicated by the use of CreateObject and the overall structure.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-9783962-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9783962-0
  • 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
73da4e56546636c0246d24a128ee097e3f12e124f4b51048532455144fb1d70c		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 15915 bytes

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