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

Static analysis result for SHA-256 8f1428999ea7462b…

MALICIOUS

Office (OLE) / .XLS

331.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: b5eeb7498f964ed0909f0ac112f25c77 SHA-1: 5de6c50089f5a74674f77988cedeca85f2649fc7 SHA-256: 8f1428999ea7462b0481e7fa4ada376b615da1f1ba882e49381d7b66f893443a
160 Risk Score

Malware Insights

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

The file contains Excel 4.0 macros, specifically triggering the Auto_Open heuristic with dangerous functions like RUN. The ShellExecute API reference further indicates the execution of external commands. The embedded URL likely serves as a download source for a secondary payload. The ClamAV detection name 'Doc.Downloader' supports this analysis.

Heuristics 5

  • ClamAV: Doc.Downloader.Docusign0521-9864805-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Docusign0521-9864805-0
  • Reference to ShellExecute API high SC_STR_SHELLEXEC
    Reference to ShellExecute API
  • 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://feromon.shop/ds/231120.gif
    • https://feromon.shop/ds/231120.gif�

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
367ec1ce7aaed8f0977647fda6a625a5496cb60a2906548fc328342f8d2ce8db		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 6060 bytes

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