Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 71241a82fa26c538…

MALICIOUS

Office (OLE) / .DOCX

160.4 KB Created: 2020-10-19 06:59:00 Authoring application: Microsoft Office Word
MD5: 4ddd53eeaf22d7da0bacd23498b67e0a SHA-1: 471b1dcdc998c8e31904f7799563fa46f6c5559b SHA-256: 71241a82fa26c5386d5d7d9572de4c12ac0110b7f383227c37ef83d30a02b528
202 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1059 Command and Scripting Interpreter

The sample is identified as malicious by ClamAV with the signature Doc.Downloader.Emotet-9780452-0, indicating it's a known Emotet downloader. Static analysis reveals the presence of obfuscated VBA macros, including a Document_Open auto-execution macro and a CreateObject call, which are typical for Emotet's initial payload delivery. The VBA script's obfuscation and use of CreateObject strongly suggest it's designed to download and execute a second-stage payload.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-9780452-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9780452-0
  • 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
f7d41255b0b3c40c0aa690966e033c6ca8b5b2cd2bda62893f4d694ed4812b08		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 15545 bytes

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