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

Static analysis result for SHA-256 c5240bd98f12c18b…

MALICIOUS

Office (OOXML) / .DOCX

184.1 KB Created: 2020-04-08 19:20:00 UTC Authoring application: Microsoft Office Word 14.0000
MD5: c767150b3986d67b2da3362f5bef9afc SHA-1: edb30fd6ed97ccad1c214c8e6334de6df781ed49 SHA-256: c5240bd98f12c18ba141cfabc8c141ecdb7c4562c6d57a9966ee0e5c9e180bda
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.003 Windows Command Shell

This OOXML document contains VBA macros, specifically an Auto_Close macro that utilizes the Shell() function to execute cmd.exe. This indicates the document is designed to run arbitrary commands, likely to download and execute a secondary payload. No specific family could be identified, and no external URLs were found to be malicious.

Heuristics 6

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close macro
  • cmd.exe reference in VBA high OLE_VBA_CMD
    cmd.exe reference in VBA
  • VBA project inside OOXML medium OOXML_VBA
    Document contains vbaProject.bin — VBA macros present
  • Suspicious extracted artifact info 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.
  • 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.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/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
03fb719e39b6beb1fd6c76c5cede52b5b199665a647d9cb9e772d360217ae168		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 8824 bytes
vbaProject_00.bin
43696690c0e885de13f451169000d4b1faf3466021457ce7eacb58a06d28f7af		 vba-project OOXML VBA project: word/vbaProject.bin 3820032 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3225 long base64-like blob(s).

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