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

Static analysis result for SHA-256 fa46f58c66b2efe4…

MALICIOUS

Office (OOXML) / .DOC

140.2 KB Created: 2021-02-07 17:10:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: fcd704916289df7f5ddacca649998ad4 SHA-1: d8004f4a8e80757f6a5f40bd888c630b5127ebfe SHA-256: fa46f58c66b2efe408b7f32af49f14d3801f7683be021f1bda3bbb0804d8520e
200 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and exhibits high-priority heuristics for VBA macros, including an AutoOpen macro and CreateObject calls. The presence of VBA macros suggests an attempt to execute code automatically when the document is opened. This is likely a downloader for a second-stage payload, although no specific URLs for this purpose were extracted.

Heuristics 6

  • ClamAV: Doc.Downloader.BlueWord12210-9918949-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.BlueWord12210-9918949-0
  • 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
1e8de16299120ef770e7d19ca31fb8ed97c794f4d319025decbd535ec20adf76		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2290 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
aa46c5dec5c8aecf6acea8b5e5c47dae607c41d17a9b6cae9d52ab7721a2d111		 vba-project OOXML VBA project: word/vbaProject.bin 100352 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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