XF.Classic — Office (OLE) malware analysis

Static analysis result for SHA-256 e5fc3db02f4e2f7c…

MALICIOUS

Office (OLE)

726.0 KB Created: 2010-01-19 04:35:01
MD5: bf7cc1fa44d9ca0de7eb917402d16e99 SHA-1: e1d69049d1691d263c3c988efaddf49fd9f38537 SHA-256: e5fc3db02f4e2f7cc9e38de38d9504e72ad25e926a44ecbd058397228434789b
60 Risk Score

Malware Insights

XF.Classic · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic for Applications

The file is identified as a legacy Excel formula macro virus, specifically 'XF.Classic' by 'Poppy by VicodinES' and 'The Narkotic Network'. The embedded document body explicitly mentions its purpose: to infect other Excel workbooks by adding itself to 'Book1.xls' in the XLSTART directory. This indicates a self-replicating macro designed to spread across user documents.

Heuristics 1

  • 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.

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