Emotet — Office (OOXML) / .DOCX malware analysis

Static analysis result for SHA-256 9be09feffa0bfc89…

MALICIOUS

Office (OOXML) / .DOCX

121.3 KB Created: 2020-01-24 13:26:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 46ad7badbb2a48affba07f886baf87d1 SHA-1: 27d39c30206ef8d0b5d5fa2ed6e04533dadc20ad SHA-256: 9be09feffa0bfc89c5c0c5718f38df8edf01001707664cc9728603f25f2ed3d6
220 Risk Score

Malware Insights

Emotet · confidence 95%

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

This OOXML document contains VBA macros, specifically a Document_Open macro, which is a common technique for Emotet. The ClamAV detection confirms the presence of Emotet. The Document_Open macro likely executes malicious code upon opening the document, aiming to download and execute further payloads. The presence of a Document_Open macro and the ClamAV detection strongly indicate a malicious dropper.

Heuristics 6

  • ClamAV: Doc.Dropper.Emotet-7560777-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Emotet-7560777-0
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • VBA project inside OOXML medium OOXML_VBA
    Document contains vbaProject.bin — VBA macros present
  • 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.microsoft.com/office/word/2010/wordprocessingCanvas
    • http://schemas.microsoft.com/office/drawing/2014/chartex
    • http://schemas.microsoft.com/office/drawing/2015/9/8/chartex
    • http://schemas.microsoft.com/office/drawing/2015/10/21/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/9/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/10/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/11/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/12/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/13/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/14/chartex
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.microsoft.com/office/drawing/2016/ink
    • http://schemas.microsoft.com/office/drawing/2017/model3d
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/officeDocument/2006/math
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
    • http://schemas.openxmlformats.org/wordprocessingml/2006/main
    • http://schemas.microsoft.com/office/word/2010/wordml
    • http://schemas.microsoft.com/office/word/2012/wordml
    • http://schemas.microsoft.com/office/word/2018/wordml/cex
    • http://schemas.microsoft.com/office/word/2016/wordml/cid
    • http://schemas.microsoft.com/office/word/2018/wordml
    • http://schemas.microsoft.com/office/word/2015/wordml/symex
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroup
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInk
    • http://schemas.microsoft.com/office/word/2006/wordml
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShape

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
c9a5bcf7aab85f75abb436e231f06499aa0a05915c9ed8459c2a2dd6109258f2		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 16228 bytes
vbaProject_00.bin
f80c76dc9383529c74ed5536d104da6b6583cefde3405e9976f7275e01ab1062		 vba-project OOXML VBA project: word/vbaProject.bin 115200 bytes
Detection
ClamAV: Doc.Dropper.Emotet-7560777-0
Obfuscation or payload: unlikely

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