Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 092bf8b8f5b9b057…

MALICIOUS

Office (OLE) / .DOCX

171.0 KB Created: 2020-10-21 13:56:00 Authoring application: Microsoft Office Word
MD5: ff19522c2782f03522c29ed0062c0016 SHA-1: b6116d3c0c7a72de60cfb2b3f526132849df31ac SHA-256: 092bf8b8f5b9b057b319753901bfa812dee6656a33712df18d26ea2b2b60725b
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 was detected as malicious by ClamAV with the signature 'Doc.Dropper.EmotetUpdate1020-9778523-0', strongly indicating the Emotet family. Heuristics confirm the presence of VBA macros, specifically a Document_Open auto-execution macro that uses CreateObject, a common technique for Emotet to download and execute further stages. The obfuscated VBA script further supports this, as it is typical for Emotet to employ code obfuscation to evade detection.

Heuristics 6

  • ClamAV: Doc.Dropper.EmotetUpdate1020-9778523-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.EmotetUpdate1020-9778523-0
  • 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
113d36c64715b3a3694b52821b832bd3a24df7013a1eebeaaceb4571875cbc4c		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 23319 bytes

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