Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 03807813fdabfa4a…

MALICIOUS

Office (OLE) / .DOCX

150.5 KB Created: 2020-09-18 17:14:00 Authoring application: Microsoft Office Word
MD5: f8c2558aee54c466bb67eb3dce7f9535 SHA-1: 3a33f2d9c7df697580101b4310cd7c57b808e9cd SHA-256: 03807813fdabfa4abf54bd21586fbd8b7e409728341a74892b6aeefc7107105a
202 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file contains a malicious VBA macro that is automatically executed upon opening the document, as indicated by the 'Document_Open' macro and 'CreateObject' call heuristics. The ClamAV detection explicitly names this as 'Doc.Downloader.Emotet-9763589-0', strongly suggesting the Emotet family. The macro's obfuscated nature and array construction point towards a downloader functionality, likely to fetch and execute a further stage.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-9763589-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9763589-0
  • 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
96b83a59c729d4e2629caf4138babfc6cae62a32b23cb8c4d357b221daf4ba67		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 20042 bytes

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