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

Static analysis result for SHA-256 07d700de0ee77b85…

MALICIOUS

Office (OLE) / .XLS

52.5 KB Created: 2010-04-13 09:21:45 Authoring application: Microsoft Excel
MD5: bb6fa35b4cadc2d042282281284c7711 SHA-1: fc96f270d3f776d54d4560ef2d0eaf3585e4e264 SHA-256: 07d700de0ee77b8589de212288dc302cfad759cd170fa7873f89f16690cd7497
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The file contains legacy Excel 4.0 (XLM) macros, identified by critical heuristics as a 'Formula Macro Virus' and 'XF.Classic'. The document body explicitly mentions 'An Excel Formula Macro Virus (XF.Classic)' and 'Hydrocodone/APAP 10-650 For Your Computer', indicating a lure to display fake pharmaceutical information. The macros are designed to infect other workbooks, as evidenced by the 'Add New Workbook, Infect It, Save It As Book1.xls' instruction.

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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