Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 689f985fe58887c7…

MALICIOUS

Office (OLE) / .DOCX

161.3 KB Created: 2020-12-30 10:10:00 Authoring application: Microsoft Office Word
MD5: fbbd2b28148e763de9cd2f15ce8120c1 SHA-1: d7189de14c6f63a09de3b219ea95518608899dba SHA-256: 689f985fe58887c75bd77a41f8c60cdcfe8d7645f0dc7c324454cf6321a5949d
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample contains VBA macros, including a Document_Open auto-execution subroutine, which is a common technique for Emotet. The VBA code uses CreateObject to instantiate the FileSystemObject and attempts to create and write to files with suspicious paths and names. This behavior strongly suggests the macro is designed to download and execute a secondary payload, consistent with Emotet's downloader functionality. The ClamAV signature also explicitly identifies it as Emotet.

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
663869ec393d0a50f151da4884835577fc196722b5e56686c64f3948abebb4bb		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6571 bytes

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