Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 65c53908c3daecd5…

MALICIOUS

Office (OLE) / .DOCX

163.0 KB Created: 2020-09-25 11:29:00 Authoring application: Microsoft Office Word
MD5: 55c23841ecfbc7510900fd2ae0ee949d SHA-1: 89e7f1e4ff186db3f0f7f1023f076cd09d9f847b SHA-256: 65c53908c3daecd50e02ebf971468d603beae0884b9ddcb8782749609404106f
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample contains VBA macros, including a Document_Open auto-execution macro, which is a common technique for Emotet. The macro attempts to execute a PowerShell command, indicated by the obfuscated string in the DOC BODY and the 'CreateObject' heuristic. This PowerShell command is likely responsible for downloading and executing a secondary payload, a hallmark of Emotet's downloader functionality.

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
426aca538f654441d66e245a00bfc928dacf37832bbf946df52799fa3650ecb1		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 24489 bytes

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