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

Static analysis result for SHA-256 4fe31e9bd352380d…

MALICIOUS

Office (OLE) / .XLS

1.51 MB Created: 2004-04-08 15:18:15 Authoring application: Microsoft Excel
MD5: d59839f9cc44602c9f8ea7419f761834 SHA-1: 3c92acf5874fcc272a5bca4ad4f0d301ea3289a4 SHA-256: 4fe31e9bd352380db10016259a02dbb227808c24683506992bf5143321ec24b6
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications

The file is an Excel 4.0 (XLM) macro sheet, identified by the OLE_XLM_AUTOOPEN heuristic. The presence of legacy Excel formula macro virus markers, specifically 'Poppy by VicodinES' and 'Narkotic Network', strongly suggests a malicious intent. The document body contains financial and project-related text, likely a lure to disguise the macro's malicious functionality.

Heuristics 2

  • Legacy Excel formula macro virus marker critical OLE_XLS_FORMULA_MACRO_VIRUS
    Workbook stream contains self-identifying legacy Excel formula macro virus markers. This indicates the document carries formula macro virus content even when no VBA project or modern XLM macro-sheet structure is present.
  • 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.

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