Office (OOXML) / .DOCX malware analysis — malicious · d7cced3bb1b3af97

MALICIOUS

Office (OOXML) / .DOCX

123.8 KB Created: 2020-01-24 17:55:00 UTC Authoring application: Microsoft Office Word 16.0000

MD5: a2ceb44810bfa65e22a5581473620ca9 SHA-1: 5743a7abf09e929acb37ac0dac21d374c6abd650 SHA-256: d7cced3bb1b3af97fb56977dd4263f3a5a0ea7cb11798ee24153413ac09f002a

220 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The presence of a Document_Open macro and a GetObject call, combined with ClamAV detections, strongly indicates malicious intent. The macro likely executes arbitrary code, leading to the 'Doc.Malware.Generic-7561114-0' detection. No specific family could be identified, but the execution flow is typical of macro-based malware.

Heuristics 6

ClamAV: Doc.Malware.Generic-7561114-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Generic-7561114-0
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.

Filename	Kind	Source	Size
`macros.bas` `2e69eaa04feffbb73e98259741bf4755e343bdf74147fd3a247cee8f53495784`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	13241 bytes
`vbaProject_00.bin` `106eae77aeacfe4074a08429ba8085d0c13fd08596c1596e54ec6b8689605d33`	vba-project	OOXML VBA project: word/vbaProject.bin	114176 bytes
Detection ClamAV: Doc.Malware.Generic-7561114-0 Obfuscation or payload: unlikely

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