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

Static analysis result for SHA-256 b2701be6d7b59343…

MALICIOUS

Office (OLE) / .XLS

317.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 0e6d3ca70f81e25baf88e5a2bb5cde7e SHA-1: 830932f1ec44148a6327f08d95b2ebaa4694d2ad SHA-256: b2701be6d7b593433a48955c5613953470e2c807a87fa18eb33334da66dd41b0
120 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1204.002 Malicious File T1059.001 PowerShell T1105 Ingress Tool Transfer

The file is an Excel 4.0 macro-enabled spreadsheet. Heuristics indicate the presence of an Auto_Open macro that uses dangerous functions, specifically the RUN function, suggesting it executes arbitrary code. The embedded URL points to a PNG file, likely a disguised payload. The macro is designed to download and execute this payload, as indicated by the RUN function and the embedded URL.

Heuristics 4

  • ClamAV: Doc.Downloader.Docusign0521-9864805-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Docusign0521-9864805-0
  • XLM Auto_Open with dangerous formula APIs high OLE_XLM_DANGEROUS_FN
    Excel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
  • Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN
    Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
  • 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://online-docu-sign-st.com/yytr.png�
    • http://online-docu-sign-st.com/yytr.png

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
a80f3c567f6c6fccfd976978b0d20ce28ce308624b09bdf11c459518344fbeff		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 5533 bytes

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