Malicious Office (OOXML) / .DOC — malware analysis report

Static analysis result for SHA-256 b9c87683d4000e24…

MALICIOUS

Office (OOXML) / .DOC

43.1 KB Created: 2021-05-11 01:37:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 3fce454b5a5ba7d73cc2b2560f69a48a SHA-1: b9321f7d1bbb1e020b03b676bd23d53e9ff6c17e SHA-256: b9c87683d4000e24d419ebe199d2c55dbb9757d5cc8f4e6d9a0295e963cbb07c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell

This OOXML document contains VBA macros, specifically a Document_Open macro that utilizes the Shell() function to execute arbitrary commands. This indicates an attempt to download and run a second-stage payload. While no specific family is identified, the execution method is a common technique for malware delivery.

Heuristics 5

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • 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://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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.

FilenameKindSourceSize
macros.bas
aaa76b6e2dda62a8ac2cd58e5fc44c672e2099ee8b872335e45568104f304c2d		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1587 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.
vbaProject_00.bin
17328a4c3c6721d98ea44eec490dede6130e269831e8906964df5f7aa759c9dd		 vba-project OOXML VBA project: word/vbaProject.bin 9728 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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