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

Static analysis result for SHA-256 94a09aff59c0c27d…

MALICIOUS

Office (OOXML) / .DOCX

39.6 KB Created: 2018-11-08 07:01:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 404ab5a93767a986b47c9fec33eb8be9 SHA-1: 0a631b0072cee1e20854b187276a0ba560d6d4f8 SHA-256: 94a09aff59c0c27d1049509032d5ba05e9285fd522eb20b033b8188e0fee4ff0
140 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

This OOXML document contains VBA macros, specifically an AutoOpen macro, which is designed to execute automatically when the document is opened. The presence of a CreateObject call indicates an attempt to run external code or manipulate system objects. While no specific malicious URLs or payloads were extracted, the macro execution is a strong indicator of malicious intent, likely for downloading and executing a second-stage payload.

Heuristics 5

  • 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.

FilenameKindSourceSize
macros.bas
db385d804088d0e96df043d52441a9973c11be05ceb32e6781fa111686291767		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 902 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
3b9b34b7ffc848990a8acfba23311e93ff882932feb86b7625c9b0ea8c68ea12		 vba-project OOXML VBA project: word/vbaProject.bin 13312 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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