Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 db26d41edf83bb22…

MALICIOUS

Office (OLE)

172.5 KB First seen: 2015-09-29
MD5: a1b8022cab4735fa68c60a9eb54553e0 SHA-1: 0497a72b489a11a51e30d57018fa56b2510fce96 SHA-256: db26d41edf83bb22be0597197b769c073a541ed3c84633e7f55360b676949b6a
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The file contains critical heuristic firings indicating the presence of legacy Excel 4.0 macros, specifically referencing 'Poppy by VicodinES' and 'Narkotic Network'. The document body presents a detailed construction bid, which is a common lure for users to enable macros. The macros are likely designed to download and execute a secondary payload.

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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