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

Static analysis result for SHA-256 4450873ee29c601e…

MALICIOUS

Office (OLE) / .VXE

71.0 KB Created: 2000-01-01 13:21:35 Authoring application: Microsoft Excel
MD5: 19acaa4f03d5c4087d2ee38d47577a57 SHA-1: 945925a6d4341ab9db0a21c772c62cb8492c596d SHA-256: 4450873ee29c601e3a048ef42771a8857cd4ba1f4a19df046e95efcb0c535c2a
140 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications

The file is an Excel 4.0 macro-enabled workbook identified as a legacy macro virus. Heuristics indicate the presence of an Auto_Open macro, suggesting it attempts to execute automatically upon opening. The document body and script excerpts mention infection routines and the potential for a payload, including a specific path for infection: 'C:\Program Files\Microsoft Office2000\Office\xlstart\Book1.'. The virus is described as 'Classic.Poppy by VicodinES' and associated with 'The Narkotic Network 1998'.

Heuristics 3

  • Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAME
    oletools recovered an Auto_Open / Auto_Close entry from an Excel 4.0 macro sheet. The raw BIFF name can be tokenized or partially opaque to byte-string checks, but the recovered macro listing confirms the workbook has an XLM auto-execution entry.
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
2624725f046dba2112ee524ec76c47f4ac85e920d849c0d713261e30c8ea4090		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 45680 bytes

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