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

Static analysis result for SHA-256 48c8a4e1743ac96b…

MALICIOUS

Office (OLE) / .XLS

2.44 MB Created: 2009-07-16 02:42:44 Authoring application: Microsoft Excel
MD5: f283653bff85ba467de874ee1d6d7f0c SHA-1: dd070f5d973fb78f6111c47b7f535131d669a986 SHA-256: 48c8a4e1743ac96bbe8fb250f14dcffe829edcbd935fc9a904fc01699e444ea7
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The critical heuristic firing indicates a legacy Excel formula macro virus, specifically mentioning 'Poppy by VicodinES' and 'The Narkotic Network'. The document body contains academic course information, likely serving as a lure. The presence of XLM macros suggests an attempt to infect other workbooks, a common behavior for this type of malware.

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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