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

Static analysis result for SHA-256 ebef0facc645f17e…

MALICIOUS

Office (OOXML) / .DOC

140.1 KB Created: 2021-01-27 17:21:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: f3129a4538555341ecf0f6dd66725b91 SHA-1: b29dc96a7395e8529f84575f86084bd2f60f2b10 SHA-256: ebef0facc645f17e3c2fc4e1db114eafbcbf63f29f0266d2a01136062e081241
200 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The file contains VBA macros, including a Document_Open macro, which is a common technique for executing malicious code automatically. The presence of 'CreateObject' further suggests the execution of arbitrary code. ClamAV identified this as a downloader, indicating its purpose is to fetch and run additional malware. No specific URLs were extracted, but the macro's intent is clear.

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.

FilenameKindSourceSize
macros.bas
f63a1125b4cc12b2506645462f5eb63f73214affa561ad5757d2a9b32628f8f1		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2162 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
caac7d49f62873fdefbb6546306a7f1fe74be72217f1be291cd16bf7e1eacd1b		 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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