Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 edf931a6edccee4c…

MALICIOUS

Office (OLE)

488.0 KB Created: 2012-09-22 09:07:38 Authoring application: Microsoft Excel First seen: 2015-09-24
MD5: 52ef7007cca86be011594e0c60ffbbc0 SHA-1: 8c2a7672bfe356f4ca3514504c74d7f15b83f731 SHA-256: edf931a6edccee4c5efbefede197de30aafae7d23d953958b1696218478b9507
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is an Excel file containing legacy Excel 4.0 (XLM) macros, indicated by the OLE_XLM_AUTOOPEN and OLE_XLS_FORMULA_MACRO_VIRUS heuristic firings. These macros are known to be used for executing arbitrary code, often to download and run further malicious payloads. The document body contains what appears to be a form for managing warranty agreements, likely a lure.

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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