Emotet — Office (OOXML) / .DOCX malware analysis

Static analysis result for SHA-256 db29ff54d37ebd76…

MALICIOUS

Office (OOXML) / .DOCX

108.4 KB Created: 2020-01-30 19:37:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 2832327a208c60f37aac31dc5312351a SHA-1: 0faec0a570bde62e57fba8b26ce29d78a001a314 SHA-256: db29ff54d37ebd7694c5190fc3ddb0ceffd896c7ed43b3f4abb8ab28658ff955
220 Risk Score

Malware Insights

Emotet · confidence 95%

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

The file is identified as malicious by ClamAV with the signature Doc.Downloader.Emotet-7570797-1, indicating a known Emotet variant. The presence of a Document_Open macro and GetObject calls strongly suggests that the VBA code within the document is designed to execute automatically upon opening. This macro likely functions as a downloader, fetching and executing a secondary payload from a remote source, which is a common Emotet delivery technique. The embedded URLs, though mostly benign schema references, are often used in conjunction with malicious payloads.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-7570797-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-7570797-1
  • 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
d8c0031e67771918c506b96dfe3d41ab78e13d130cbd2cf64d2a549e8430ecb5		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 5431 bytes
vbaProject_00.bin
c315d919f7f68eba915359c00f9ee410e32d40d615b9c6c6715e9ffb5ecbe2a1		 vba-project OOXML VBA project: word/vbaProject.bin 42496 bytes
Detection
ClamAV: Doc.Downloader.Emotet-7570797-1
Obfuscation or payload: unlikely

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