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

Static analysis result for SHA-256 d317d07872fe22a8…

MALICIOUS

Office (OOXML) / .DOCX

25.1 KB Created: 2020-03-18 14:00:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: fdcd87c83c61f0f26fffff9a9ad6faf4 SHA-1: e6d553567658bdaf47baa9dae09cdf016101733b SHA-256: d317d07872fe22a85824a691b069a6e6ffab09d67bf2ed67b7b65432c0bc882e
268 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.005 Visual Basic

This OOXML document contains VBA macros, specifically a Document_Open macro, which is designed to execute automatically when the document is opened. The document body explicitly instructs the user to 'Enable Editing' and 'Enable Content', a common social engineering tactic to bypass macro security. The presence of a Document_Open macro, CreateObject, and GetObject calls, along with the ClamAV detection of 'Doc.Dropper.Agent-7633750-0', strongly indicates that this file is a macro-based dropper intended to download and execute a second-stage payload.

Heuristics 9

  • ClamAV: Doc.Dropper.Agent-7633750-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-7633750-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
  • 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
069b2823840c98528bee1a58db7c96b0baab1fe6c54e35fc7e6e8f57aea06e34		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 3083 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.
vbaProject_00.bin
a462ab3770de1377852d7054ff7fad978f9b7120ceb95c897eed54ef535bc79a		 vba-project OOXML VBA project: word/vbaProject.bin 32256 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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