Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 15371152934c754e…

MALICIOUS

Office (OLE) / .DOCX

130.3 KB Created: 2020-10-14 12:13:00 Authoring application: Microsoft Office Word
MD5: 922dafc2e55ab374683f29d4ed08e404 SHA-1: 6b3726ca3d2baf8c5c6587d606f27f1c9d19caef SHA-256: 15371152934c754e9e090e7629dfff5aa54316e613f026df29de311a408194a2
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.Downloader.Emotet-9778018-0, indicating it is likely part of the Emotet botnet. The presence of VBA macros, specifically a Document_Open macro that uses CreateObject, strongly suggests it's designed to execute malicious code upon opening. The script's obfuscated nature and use of concatenation for constructing strings point towards a downloader functionality, aiming to fetch and execute further stages of the malware.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-9778018-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9778018-0
  • 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
9ff2f6164d63cd97fef8963d2b7a6ca348ed28032df5d8d3d018a1f3d500bd9b		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 9476 bytes

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