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

Static analysis result for SHA-256 563477ea68f3bb4a…

MALICIOUS

Office (OLE) / .XLS

331.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 82960fe6e80c3d6d6b37630908ac3a08 SHA-1: 7a992812a1be8f163fd2407ae00634a6d9427b1c SHA-256: 563477ea68f3bb4a07a24d7a266171e655e998fd4bc5e2c265a77bfe2cb2376e
160 Risk Score

Malware Insights

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

The presence of Excel 4.0 macros, specifically an Auto_Open macro utilizing dangerous functions like RUN, strongly indicates malicious intent. The heuristic firings suggest the macro is designed to execute external code. The embedded URL likely serves as the distribution point for a second-stage payload, consistent with downloader malware behavior.

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 http://ski-travel.pl/ds/231120.gif
    • http://ski-travel.pl/ds/231120.gif�

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
d0d7060848f9e43377c289847dba3120f97cf87e725bc4bc328c35415fe210f7		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 6298 bytes

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