Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 5ed1837989ad7b66…

MALICIOUS

Office (OLE)

246.0 KB First seen: 2015-09-15
MD5: 052254b487b0e68290c4114b1ff346f0 SHA-1: 3980ad26de0f8f5f9105b9740314f92b074b0774 SHA-256: 5ed1837989ad7b66436e09a6a9960fe1fa054b4b480dabb09d7630703b3ab7af
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is identified as a malicious Excel 4.0 macro virus, specifically referencing 'XF.Classic' and 'Poppy by VicodinES'. The document body explicitly mentions infecting other workbooks and saving them as 'Book1.xls', indicating a self-propagating mechanism. The presence of legacy Excel macro markers and the self-description suggest a payload delivery or system compromise attempt.

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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