Office (OOXML) / .DOC malware analysis — malicious · 7e5b61abeee5149a

MALICIOUS

Office (OOXML) / .DOC

140.4 KB Created: 2021-01-27 17:21:00 UTC Authoring application: Microsoft Office Word 16.0000

MD5: b634c436a10f4ff9655caa0c2f7c4429 SHA-1: db837e138dc7393de8c27c9678025bdc5c86bb0a SHA-256: 7e5b61abeee5149a63296fa2f09123f352b695dc2fd2111c82a950f5fc7c7fea

200 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The file is identified as malicious by ClamAV with the signature Doc.Downloader.BlueWord12211-9918950-0. Static analysis revealed the presence of VBA macros, specifically a Document_Open macro, which is designed to execute automatically when the document is opened. This macro likely attempts to download and execute a second-stage payload, a common technique for malware delivery. The extracted information strongly suggests a macro-based downloader attack pattern.

Heuristics 6

ClamAV: Doc.Downloader.BlueWord12211-9918950-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.BlueWord12211-9918950-0
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open 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` `b79b1c12bdccd2b6b2244173614b5a65e9568caf057b420ff213d8fb0c0c984d`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	2293 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` `73524c336afba6508a45878e9d4809f0f78e100b0c22a7ee3fe4e01824cfabbc`	vba-project	OOXML VBA project: word/vbaProject.bin	113664 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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