Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 e8ad77f2e10854c3…

MALICIOUS

Office (OLE)

279.5 KB Created: 2009-03-16 06:53:20 Authoring application: Microsoft Excel First seen: 2015-09-14
MD5: 002ad7bbae366b4c4f5b278ad90bd8e0 SHA-1: c5fa1164dfdc586fb70a73fba0ebab62bae4fec0 SHA-256: e8ad77f2e10854c33aae6a1557b615132760043d91fdd9d8d6fa04c81574196a
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1203 Exploitation for Client Execution

The critical heuristic 'OLE_XLS_FORMULA_MACRO_VIRUS' and the medium heuristic 'OLE_XLM_AUTOOPEN' indicate the presence of legacy Excel 4.0 macros. The script excerpts reveal strings like 'Classic.Poppy by VicodinES' and 'An Excel Formula Macro Virus (XF.Classic)', suggesting a known macro-based malware. The script also contains instructions to 'Add New Workbook, Infect It, Save It As Book1.xls', indicating a downloader or dropper functionality.

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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