Office (OOXML) / .DOCX malware analysis — malicious · 9b24e36885da1e42

MALICIOUS

Office (OOXML) / .DOCX

21.8 KB Created: 2024-10-30 00:45:00 UTC Authoring application: Microsoft Office Word 16.0000

MD5: 1f9d2be9980612244c80cbe9767d44e6 SHA-1: faf1405874ef1070da0714cd911f9bb008a3962f SHA-256: 9b24e36885da1e4240c61dd91fbd847010e3586027eac940a2ecc7d8b55f3eef

340 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.005 Visual Basic T1059.001 PowerShell

This OOXML document contains a Document_Open macro that utilizes the Shell() function and references PowerShell. The ClamAV heuristic 'Doc.Malware.Valyria-10002559-0' strongly indicates malicious intent. The document body presents a lure about an anime festival to encourage users to enable macros, which would then trigger the execution of the malicious script.

Heuristics 8

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
PowerShell reference in VBA critical OLE_VBA_PS

PowerShell reference in VBA
ClamAV: Doc.Malware.Valyria-10002559-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Valyria-10002559-0
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
Suspicious extracted artifact high 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.
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.openxmlformats.org/markup-compatibility/2006
- 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/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` `f9f3eb3f8e3fc7c6f868ba30b07bcb5a9e5e1a3cc6c32b2d5737815650aaa1f3`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	6152 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.
`vbaProject_00.bin` `0e9114359d71804165117d0d6c9e860fecb99cd0b9fd26be2236b94d394d3223`	vba-project	OOXML VBA project: word/vbaProject.bin	23040 bytes
Detection ClamAV: Doc.Malware.Valyria-10002559-0 Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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