Office (OOXML) / .DOC malware analysis — malicious · 25e398bef7c2e733

MALICIOUS

Office (OOXML) / .DOC

140.0 KB Created: 2021-02-07 17:10:00 UTC Authoring application: Microsoft Office Word 16.0000

MD5: fd15be74b4a5f09de2e44c8223e3120f SHA-1: 516f9f2cd0ef22e2644a6d2b2beb322f93bdc228 SHA-256: 25e398bef7c2e7335baa1327aafbe76425f60d840a75175c7fca68fb54354dab

200 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The sample contains VBA macros, including an AutoOpen macro, and uses CreateObject, indicating it is designed to execute code upon opening. The ClamAV detection and heuristic firings strongly suggest this is a downloader. No specific URLs were extracted, but the presence of VBA macros and the AutoOpen function points to a malicious document designed to fetch and run a secondary payload.

Heuristics 6

ClamAV: Doc.Downloader.BlueWord12210-9918949-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.BlueWord12210-9918949-0
AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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.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` `62bcf9fc59ce61dd3c49f3ab6ac8462d1331f3f88fef9bb86b4aefbb161eb187`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	2282 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`vbaProject_00.bin` `4fabb043d4f31e0825f60c43ecf92c79d1c4595a1c9925f60e44bbfacd5e9615`	vba-project	OOXML VBA project: word/vbaProject.bin	99328 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.

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