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

Static analysis result for SHA-256 041451a90e0d5a13…

MALICIOUS

Office (OLE) / .XLS

3.97 MB Created: 2010-01-28 15:32:24 Authoring application: Microsoft Excel
MD5: 09e0eaa446be67e1b85eb3bb7898416a SHA-1: 570a7887d576f4cd16702d6417613c447233f412 SHA-256: 041451a90e0d5a13618633fae2e4393cb2c330b6d9742db4fd4f728c27ef594f
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is an Excel file containing Excel 4.0 (XLM) macros, indicated by the OLE_XLM_AUTOOPEN heuristic. The presence of markers like 'Excel Formula Macro Virus', 'Poppy by VicodinES', and 'Narkotic Network' strongly suggests a malicious intent, likely to execute arbitrary code or download further payloads. The document body content appears to be unrelated structural data, providing no additional context for the macro's purpose.

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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