Emotet — Office (OOXML) / .DOCX malware analysis

Static analysis result for SHA-256 258f0a612a2fca0b…

MALICIOUS

Office (OOXML) / .DOCX

128.5 KB Created: 2020-01-31 15:46:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 395119fc91aa81c791512ea16ea97c34 SHA-1: daf6b85b2c4a70fc928e51473d98141ad33e2cbb SHA-256: 258f0a612a2fca0b3d26ec81cc77b81d2d98ab3e7800f96314af353e2ddd25a6
222 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file is identified as malicious by ClamAV with the signature Doc.Malware.Emotet-7571982-0, strongly indicating the Emotet family. The presence of a Document_Open macro and a GetObject call within the VBA project suggests that the macro is designed to execute automatically upon opening the document. This macro likely downloads and executes a secondary payload, a common Emotet tactic. No specific URLs or other IOCs were extracted beyond the ClamAV signature.

Heuristics 7

  • ClamAV: Doc.Malware.Emotet-7571982-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-7571982-0
  • 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
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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
4004734b08d3f0fdc17e90039b88a993729ed3e9870f149cabf8d71fd8e21b30		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 8657 bytes
vbaProject_00.bin
3acdda2979ce84d9e813c3c6283f06d9adb1ac949851321856157771ebfa0f94		 vba-project OOXML VBA project: word/vbaProject.bin 56832 bytes
Detection
ClamAV: Doc.Malware.Emotet-7571982-0
Obfuscation or payload: likely
Carved artifact contains 2 long base64-like blob(s).

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