Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 6758d3603f3eab05…

MALICIOUS

Office (OLE) / .DOCX

188.5 KB Created: 2020-09-16 18:57:00 Authoring application: Microsoft Office Word
MD5: fe83674fe851f4c3c166b8350b24a6d4 SHA-1: 337ddaf1b1b6a840cff67dcf1cfa4287845765e0 SHA-256: 6758d3603f3eab05e72d8c9e6f7714f93f572ca89397a5018c8104d0c6099810
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 identified as malicious by ClamAV with the signature 'Doc.Downloader.Emotet-9762284-0', indicating a known Emotet downloader. The presence of a Document_Open macro and CreateObject calls strongly suggests the execution of VBA code designed to download and run a secondary payload. The obfuscated VBA script, while difficult to fully deconstruct, contains string concatenation patterns typical of malware attempting to hide its malicious intent.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-9762284-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9762284-0
  • 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
c8eacd47a01532c076db7a43a0d927f95cb78ca92fb9fc841101993b58287d9b		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 19132 bytes

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