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

Static analysis result for SHA-256 cb458163692438db…

MALICIOUS

Office (OLE) / .XLS

295.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 83adf2be471440a9889bc87cfa304bd0 SHA-1: deebe47b523b0cf5a1c1925c80c1a2e8ec06cf26 SHA-256: cb458163692438db209c6532e4e7d320055e602abdf1011a9c200a78bf6eecbc
120 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The file is an Excel 4.0 (XLM) 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 and the presence of a potential executable path in the document body point towards a downloader functionality. The ClamAV detection name 'Doc.Downloader.Docusign0521-9864805-0' further supports this, indicating a downloader disguised as a DocuSign-related document.

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 https://bluesteelenergy.com/derton/energy.php�
    • https://bluesteelenergy.com/derton/energy.php

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
3e425007214646743a3e61764ed3febef72e2eff209c4c7673da5eb96971ea1a		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 4736 bytes

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