Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 797f4e41990e2ac0…

MALICIOUS

Office (OLE)

235.0 KB Created: 2008-05-12 09:02:04 Authoring application: Microsoft Excel
MD5: c24086b024b1784e55323ad8dab1553b SHA-1: d3e54ab6d68870d411a8a921b7aa195327e478fb SHA-256: 797f4e41990e2ac04bb2881a42a9c253d2547d2bc1876fc9b81a16c31e2cf2ce
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The critical heuristic firing indicates a legacy Excel formula macro virus, specifically mentioning 'Poppy by VicodinES' and 'Narkotic Network'. The document body confirms this, containing strings like 'Classic.Poppy by VicodinES', 'An Excel Formula Macro Virus (XF.Classic)', and 'The Narkotic Network 1998'. The script's intent appears to be infecting other workbooks and potentially displaying a fake educational report, as suggested by the presence of sheet names like 'Sheet1', 'Sheet2', 'Sheet3', 'XL4Poppy', and the text resembling a report. The IOCs point to the default Excel startup directory and a specific filename, likely where the macro attempts to place its payload.

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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