Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 8856732c8155cf2d…

MALICIOUS

Office (OLE)

176.5 KB First seen: 2015-09-16
MD5: 5205557c82bc225b066ec46a46493170 SHA-1: cda36d5e7545fb5b5627878eb43901b6692db164 SHA-256: 8856732c8155cf2d03f32d7a29a5b65f61de4d44b9bc5c1b47e7a50cea5a632d
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is an OLE file containing Excel 4.0 macros, indicated by the OLE_XLM_AUTOOPEN and OLE_XLS_FORMULA_MACRO_VIRUS heuristic firings. These heuristics specifically mention legacy Excel formula macro virus markers and names associated with known malicious content, suggesting the macro is designed to execute malicious commands. The presence of these markers strongly indicates a malicious intent to compromise the system upon opening the file.

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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