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

Static analysis result for SHA-256 b6d6fe71516b8844…

MALICIOUS

Office (OOXML) / .DOC

75.8 KB Created: 2021-03-11 19:45:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 12d62888e14432cd9c6e09e13ede91c8 SHA-1: 78086c8357c3bb40d2771a9da512e9d055497405 SHA-256: b6d6fe71516b8844c38b2f1c6c5081e7a016b0898bb6fa0c943da6403bfb68ba
200 Risk Score

Malware Insights

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

This OOXML document contains VBA macros, including an AutoOpen macro, which is designed to execute automatically when the document is opened. The macros utilize the Shell() function and CreateObject, indicating an attempt to run external commands or download additional malicious content. The presence of these indicators strongly suggests a downloader or droppper functionality, though the specific payload and family are not identifiable from the provided static analysis.

Heuristics 6

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • 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
8417f7a0649f8d67aac90a89d64d32582d56aeb334384bfcb13b4bdb5fd1807e		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 5335 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s). Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 7 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.
vbaProject_00.bin
261402c40b06184400dc3f59434f0e01c3550efbb94f222c4cbc9b6c52de602e		 vba-project OOXML VBA project: word/vbaProject.bin 27648 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s). Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 7 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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