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

Static analysis result for SHA-256 92fd1b0ee8014811…

MALICIOUS

Office (OLE) / .XLS

1020.5 KB Created: 2009-03-28 01:10:38 Authoring application: Microsoft Excel
MD5: 99a8d9ef2564692bde026fcbbb6e3a7d SHA-1: 699132e607f46961e14bcb249a54df192e7865b2 SHA-256: 92fd1b0ee80148113c256b57cda4c08ac8660189997b3148d5b4e1e2f02512d1
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Service Execution: Visual Basic T1566.001 Phishing: Spearphishing Attachment

The sample is an Excel file containing legacy Excel 4.0 (XLM) macros, indicated by the OLE_XLM_AUTOOPEN and OLE_XLS_FORMULA_MACRO_VIRUS heuristics. These macros are often used for malicious purposes, such as downloading and executing further payloads. The presence of markers like 'Poppy by VicodinES' and 'Narkotic Network' suggests a connection to known malware distribution techniques, although a specific family cannot be confidently identified.

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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