Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 15220c43248046fa…

MALICIOUS

Office (OLE) / .DOCX

161.8 KB Created: 2020-09-24 23:07:00 Authoring application: Microsoft Office Word
MD5: 1a771b97684d66b4e7971b1169e5129f SHA-1: 99394a833081fd23c49905e352db4c6773c2b0c2 SHA-256: 15220c43248046fa93074c3c80521f9773803510ac48a42f7de5b5c28c97eafa
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 technique for Emotet. The macros utilize CreateObject to execute obfuscated PowerShell commands. The ClamAV detection explicitly identifies the file as 'Doc.Downloader.Emotet-9765780-0', strongly indicating the Emotet family. The obfuscated PowerShell execution is designed to download and execute a secondary payload.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-9765780-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9765780-0
  • 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
822ca2bb5afccdd585dd9d4b3c04999cc0b411b7c4b99b6e373f1239fc1c4ef1		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 26832 bytes

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