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

Static analysis result for SHA-256 9db0a3007a0e0dcd…

MALICIOUS

Office (OOXML) / .DOC

204.8 KB Created: 2021-01-20 19:12:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 4f726a38b7b33f81769f30e07ca14c47 SHA-1: e7d8242944ddc025e806b9ed5f59d62b43625694 SHA-256: 9db0a3007a0e0dcd27ba7b23a424d62856524d1a9f4404a8fdec6843e802e934
200 Risk Score

Malware Insights

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

The sample is a malicious OOXML document containing VBA macros, specifically triggering a Document_Open macro. Heuristics indicate the use of CreateObject, a common technique for downloading and executing payloads. The ClamAV detection name 'Doc.Downloader' further supports this. The primary intent appears to be downloading and executing a second-stage payload.

Heuristics 6

  • ClamAV: Doc.Downloader.87f88707f007f878-OOXML-9981544-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.87f88707f007f878-OOXML-9981544-0
  • 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.microsoft.com/office/drawing/2015/9/8/chartex
    • http://schemas.microsoft.com/office/drawing/2015/10/21/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/9/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/10/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/11/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/12/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/13/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/14/chartex
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.microsoft.com/office/drawing/2016/ink
    • http://schemas.microsoft.com/office/drawing/2017/model3d
    • 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/2016/wordml/cid
    • 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
e13aa5908303b67501e351adc3395d92ba4064ecf5650fd92df5f9b19c1ff46d		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2096 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
0beb76fe792e82cfeb0df4f545f8c87a4e1cb1a0a5cdc05c9de0b34fbdddbd5e		 vba-project OOXML VBA project: word/vbaProject.bin 49152 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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