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

Static analysis result for SHA-256 54d6c8941589f739…

MALICIOUS

Office (OLE) / .XLS

1.34 MB Created: 2010-02-23 08:53:44 Authoring application: Microsoft Excel
MD5: 9540bef2c26fc35766a6629d41d23e6e SHA-1: e92d3634502f4f14299a5efdf3a60615543a21c3 SHA-256: 54d6c8941589f7392a34b2b64294049f40b06849edabb13b6d56db0a481f31a9
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Service Execution: Visual Basic

The sample contains legacy Excel 4.0 (XLM) macros, indicated by the OLE_XLM_AUTOOPEN heuristic. The presence of the 'XL4Poppy' string and the OLE_XLS_FORMULA_MACRO_VIRUS heuristic suggests this is a known macro-based threat. The document body appears to be a legitimate business agreement, likely used as a lure to trick users into enabling macros.

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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