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

Static analysis result for SHA-256 bf206682715bf55b…

MALICIOUS

Office (OLE) / .DOC

1.21 MB Created: 2023-07-10 03:02:00 Authoring application: Microsoft Office Word First seen: 2023-07-12
MD5: 04903411cb9a638f833408349fa77755 SHA-1: be6dea729fb312a8a94fccb3c137787105b1003a SHA-256: bf206682715bf55b29e589539dcee558bf45848be99545cf8d823e19c23b4c8d
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The Document_Open VBA macro executes a Shell command that downloads a batch file named 'Au23Tyxg' using curl and then executes it. This indicates the document is a downloader for a second-stage payload. The VBA macro uses cmd.exe to orchestrate the download and execution, and the embedded URL is the primary indicator of compromise.

Heuristics 6

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • cmd.exe reference in VBA high OLE_VBA_CMD
    cmd.exe reference in VBA
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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 https://gist.githubusercontent.com/hastalamuerte/f57bd99371ca9c289bfa9d5498c7c446/raw/bcefa9dbd0f1dcad2628cc70f365e5560554a467/Au23Tyxg
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
334987374b0c0690ac3f0cf16c423fcfce9f9e35407b35f6a4881c8192d0268c		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 860 bytes

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