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

Static analysis result for SHA-256 8d6a3356fcc152dc…

MALICIOUS

Office (OOXML) / .DOC

55.5 KB Created: 2020-05-25 22:56:00 UTC Authoring application: Microsoft Office Word 14.0000
MD5: cbc3a6228e8e8fcca69d575fa87c38dc SHA-1: dff5fe676bca234fb9d1c514e1b202df1f9c9969 SHA-256: 8d6a3356fcc152dcea685c70502b8e29fe09b5168d8b9861b30e49e3527c8532
260 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell

The sample contains VBA macros, specifically a Document_Open macro that utilizes the Shell() function. This indicates the document is designed to execute arbitrary commands upon opening. The ClamAV heuristic also flags it as a generic dropper. The primary function appears to be downloading and executing a secondary payload, though the specific URL or command is not directly extractable from the provided evidence.

Heuristics 7

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Doc.Dropper.Generic-9823774-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Generic-9823774-0
  • 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.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
43e4c772f87ba008f65b426eb76c822fd70e9d5b8e090d0f08ba3b6e5481636e		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2812 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
cf7764b9c4661575a7ad971aa430836ed7d1fc288d0dee7567345f8e84d4a6eb		 vba-project OOXML VBA project: word/vbaProject.bin 11776 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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