Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 638f854ddf051264…

MALICIOUS

Office (OLE) / .DOCX

173.4 KB Created: 2020-09-30 10:55:00 Authoring application: Microsoft Office Word
MD5: d96e5be34b0cab66a206661fafb147a3 SHA-1: e70b4740a29d408b5904624842763c1a5ffa83ae SHA-256: 638f854ddf0512642125aa805b9b59a11c6197b711e11aa71db57fabb2f83f67
202 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The file is a Microsoft Word document containing VBA macros, specifically a Document_Open macro that uses CreateObject. This is a common pattern for Emotet malware to download and execute a secondary payload. The ClamAV detection name 'Doc.Downloader.EmotetRed02224-9938637-0' further supports this classification. The obfuscated VBA code is designed to evade static analysis but its execution upon opening is clear.

Heuristics 6

  • ClamAV: Doc.Downloader.EmotetRed02224-9938637-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed02224-9938637-0
  • 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
e574dc9e5be70b9e64389cc5809b4b9a70fc86bbb2ebeadb9aa3663111f6add5		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10540 bytes

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