Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9de998169f8e0de2…

MALICIOUS

Office (OLE)

140.0 KB First seen: 2015-09-22
MD5: 112aa41c6ac80bc2ceb7ae13bfdc4640 SHA-1: 983d195aa511d745722567966e626cc4cf5a4cab SHA-256: 9de998169f8e0de287443c1d09c06627cc702316cdc5720cc1631fc849028ecd
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is identified as a malicious Excel 4.0 macro sheet by critical heuristics, indicating the presence of legacy macro virus markers like 'Poppy by VicodinES' and 'Narkotic Network'. The document body, despite appearing to be a government-related form, contains embedded instructions for macro execution and infection, suggesting it's a lure. The primary function is to infect other workbooks and potentially deliver a secondary payload.

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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