Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 0495b89fed42b19d…

MALICIOUS

Office (OLE) / .DOCX

101.7 KB Created: 2020-09-29 17:52:00 Authoring application: Microsoft Office Word
MD5: 2a5f25e3b4d323219bba9f4e4d998fed SHA-1: d6426da40aae9bc1bfe782938e4337aa2ab454fa SHA-256: 0495b89fed42b19dc6fd71b8f9a2dbea746f203b28ce8388a4069e86385b5207
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample is a Microsoft Office document with VBA macros, specifically triggering on Document_Open. The ClamAV detection explicitly identifies it as 'Doc.Downloader.Emotet-9769356-0', strongly suggesting the Emotet family. The VBA code uses CreateObject and obfuscated arithmetic operations, typical for downloading and executing further stages. The presence of the 'macros.bas' file and the Document_Open auto-execution points to a macro-based downloader.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-9769356-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9769356-0
  • 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
77f0fc2bd0d5c985be4d4cb3501afb191ffadc98be204ef2c40c091585c5d90a		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10395 bytes

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