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

Static analysis result for SHA-256 f2a8f0cbaac12a0c…

MALICIOUS

Office (OOXML) / .DOC

247.6 KB Created: 2021-02-07 17:10:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 56f7b054b427ea2d792ab0be8fb75d9c SHA-1: 172fb6612ff2a5dd7aadcb4dd33f8ea62687c036 SHA-256: f2a8f0cbaac12a0c85474bfea7e3d58963ba81a79d978a518ea3be37949e8a58
200 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1140 Deobfuscate or Obfuscate

The file is an OOXML document containing VBA macros, indicated by the 'OOXML_VBA' and 'OLE_VBA_AUTOOPEN' heuristics. The 'OLE_VBA_CREATEOBJ' heuristic suggests the macro attempts to create objects, likely for malicious purposes. The ClamAV detection 'Doc.Downloader.BlueWord12213-9918951-0' strongly suggests a downloader functionality. The presence of an 'AutoOpen' macro implies that the malicious code executes automatically when the document is opened, a common technique for initial access and payload delivery.

Heuristics 6

  • ClamAV: Doc.Downloader.BlueWord12213-9918951-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.BlueWord12213-9918951-0
  • 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
b1cec46e9a52c765ba03e2f8e4750462871c4dc690e02d00b4051e6043063923		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2359 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
ec1f29b9d5e80c279d85c41cbdebeebff26d965f23ab5a651d1fde1ac123bd57		 vba-project OOXML VBA project: word/vbaProject.bin 97280 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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