Office (OOXML) / .DOC malware analysis — malicious · 3905f32293f0f6bb

MALICIOUS

Office (OOXML) / .DOC

50.4 KB Created: 2021-05-10 15:13:00 UTC Authoring application: Microsoft Office Word 16.0000

MD5: 02c83f5255f43a2fae36ceb88223599e SHA-1: 81d3a39a081d3e8d590cf911635b38fca967901a SHA-256: 3905f32293f0f6bb16fae72b8e80e124408079824fc9b2c76c03068947f07f46

260 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

The OOXML document contains VBA macros, including a Document_Open macro, which is a common technique for initial execution. The macros utilize WScript.Shell and CreateObject to execute arbitrary commands, likely to download and run a second-stage payload. The presence of these high-severity heuristics indicates a malicious intent to execute code from the document.

Heuristics 7

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
WScript.Shell usage critical OLE_VBA_WSCRIPT

WScript.Shell usage
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` `b023576ab29cc36c3acecf97d667221b75dbe3b8ffe5a45546a77a9c413f7baf`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	2480 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` `8a057e624e3c3d34aa53cc5741392cfdbd56d213c95d78a811a9a70376896b26`	vba-project	OOXML VBA project: word/vbaProject.bin	17408 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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