Emotet — Office (OOXML) / .DOCX malware analysis

Static analysis result for SHA-256 1c96dc2ca50755af…

MALICIOUS

Office (OOXML) / .DOCX

129.4 KB Created: 2020-02-04 22:11:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 2bf2c76c0b0626e625e1630f420b3811 SHA-1: 3dad887a75214623af9f5b3fd505fb312583cc7f SHA-256: 1c96dc2ca50755af8de45649f800c5bc8afe690dec831035e2c9c004447e2e63
220 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The file is detected as Emotet by ClamAV, indicating it is a downloader. The presence of a Document_Open macro and GetObject calls strongly suggests that the VBA code is designed to execute automatically upon opening the document. This macro likely downloads and executes a second-stage payload from a remote source, consistent with Emotet's typical behavior. The ClamAV detection name 'Doc.Downloader.Emotet-7577854-0' is included as a primary IOC.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-7577854-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-7577854-0
  • 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
98eb9eefb3a64f476de7a46d097230041f21769cbef75bf55c44655778b88d0b		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 11803 bytes
vbaProject_00.bin
25c3233f1dda096ef7eb82860d63d16ffb94ef75c024cd52f958e28c98a3b9b9		 vba-project OOXML VBA project: word/vbaProject.bin 75776 bytes
Detection
ClamAV: Doc.Downloader.Emotet-7577854-0
Obfuscation or payload: unlikely

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