Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 df8f7c55ecdbb578…

MALICIOUS

Office (OLE)

172.0 KB Created: 2010-05-19 03:24:03 Authoring application: Microsoft Excel First seen: 2015-09-30
MD5: a2cac8e958f9284e03c33f276e990fe0 SHA-1: 53e106ae429783d2589be0e4fe6a71f73d41142c SHA-256: df8f7c55ecdbb5785e212d802d3ade5b186dc8569ccb2ac745c39e9655222543
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is identified as malicious due to the presence of critical heuristics indicating a legacy Excel Formula Macro Virus, specifically 'XF.Classic' and 'Poppy by VicodinES'. The document body contains embedded text referencing these names and a payload, along with a path that suggests an attempt to infect other workbooks by saving them as 'Book1.xls'. This indicates the macro's intent is to spread and potentially execute further malicious code.

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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