Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 850a811a1e29aafa…

MALICIOUS

Office (OLE) / .DOCX

175.9 KB Created: 2020-10-20 22:39:00 Authoring application: Microsoft Office Word
MD5: 7d00abb4b458b0819514cbcf6aee19cf SHA-1: d851ba00897d56453bcaaae591cd9077b0966401 SHA-256: 850a811a1e29aafadeaca369778609e35c77edcb8588f69f153e44195d40d6b5
202 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file contains VBA macros, including a Document_Open auto-execution macro, which is a common technique for Emotet. The heuristics indicate the use of CreateObject, suggesting the macro is designed to execute code. The ClamAV signature also explicitly identifies it as Emotet. The VBA script itself is heavily obfuscated but its structure and the presence of auto-execution macros strongly suggest it's a downloader for a second-stage payload.

Heuristics 6

  • ClamAV: Doc.Malware.Emotet-9781039-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9781039-0
  • 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
130bc91dd8b5ad391a87daabf287b6e2ceed1d78136a29ff57bedf25aa736586		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18991 bytes

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