Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 63c70c3f9100ecbd…

MALICIOUS

Office (OLE) / .DOCX

201.1 KB Created: 2020-09-25 06:51:00 Authoring application: Microsoft Office Word
MD5: d633c5cdda07e7ad88e2a9679ebb885d SHA-1: d4e79a6e58e9cefbb50fb21b4747db4f9b1bc02e SHA-256: 63c70c3f9100ecbd5ceed01c952d8fa54927a057e656b6b29e6013c8fc1dd735
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample contains VBA macros, specifically a Document_Open macro that utilizes CreateObject, indicating malicious intent. ClamAV detection confirms this as Doc.Downloader.Emotet. The obfuscated VBA code within the macros is designed to execute a secondary payload, likely via PowerShell, as suggested by the heuristic firings and the nature of Emotet. The presence of the 'macros.bas' file and the Document_Open macro strongly point to Emotet's typical behavior of downloading and executing further malicious content.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-9767804-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9767804-1
  • 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
d802c65eb8f9df036cf46e9408744e30c5d95dae54b582b9f65ecb84ecb28fa8		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 25261 bytes

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