Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 f9c99dce838e8794…

MALICIOUS

Office (OLE)

183.0 KB Created: 2014-05-14 09:09:13 Authoring application: Microsoft Excel First seen: 2015-09-17
MD5: 1f6351579fc793864085bdfe492fbd20 SHA-1: 3a8428b2bfcc57b100ab13120f5118b194d7e451 SHA-256: f9c99dce838e8794fca92479ab5da3e56031eb2d1011ac43d405edea7baf2396
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The critical heuristic firing indicates the presence of a legacy Excel Formula Macro Virus, specifically mentioning 'Poppy by VicodinES' and 'The Narkotic Network'. The document body contains what appears to be academic course data, likely a lure, and references to Excel startup paths and macro sheet markers. The presence of XLM macros suggests an older, but still potentially dangerous, infection vector.

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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