Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 b57ae162dd2add53…

MALICIOUS

Office (OLE)

1.19 MB Created: 1997-03-16 09:26:44 Authoring application: Microsoft Excel First seen: 2015-10-13
MD5: ed686b45bb5dfa9182d53306e2c625f0 SHA-1: 5f4a1147e5128affbaf770317f8255e631f19c4a SHA-256: b57ae162dd2add533f1d5b2b8977039108c4098a0725e08200f02ac4770836d8
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The critical heuristic 'OLE_XLS_FORMULA_MACRO_VIRUS' and the presence of 'Excel Formula Macro Virus', 'XF.Classic', and 'Poppy' in the document body strongly indicate a legacy Excel formula macro virus. The malware attempts to infect other workbooks by saving itself as 'Book1.xls' in various XLSTART directories, suggesting an attempt at persistence and propagation.

Heuristics 1

  • 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.

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