Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 5b726ecb7ad325e2…

MALICIOUS

Office (OLE) / .DOCX

256.5 KB Created: 2020-10-29 06:41:00 Authoring application: Microsoft Office Word
MD5: 24c8fc2fce27205571a4388c057fc18b SHA-1: e129943c000c3b6911a403531a91c5899a8f412d SHA-256: 5b726ecb7ad325e2d05699317aa58a4b4c1dbbad89e3220d42a0de36ef4d0603
202 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information

The sample is a Microsoft Office document containing VBA macros, specifically a Document_Open macro that uses CreateObject. ClamAV identifies it as 'Doc.Downloader.EmotetRed02224-9938637-0', strongly suggesting Emotet family. The VBA code is heavily obfuscated but the presence of a Document_Open macro and CreateObject calls indicates an attempt to download and execute a secondary payload, a common Emotet tactic. The embedded URL 'http://schemas.openxmlformats.org/drawingml/2006/main' was confirmed benign and is likely a false positive or part of the obfuscation.

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
3a8074405c54d9e6984963caa3cafcf4e8c3b540e24ba2ba0a45964d8f0aaa49		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18973 bytes

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