Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 f39807b5cdef5aa5…

MALICIOUS

Office (OLE)

465.5 KB Created: 2012-05-10 08:13:59 Authoring application: Microsoft Excel First seen: 2015-09-17
MD5: 2810cb4a526283ac2900384d10242980 SHA-1: 2507076f561ad1b9898fd88c50a853db82fb16ce SHA-256: f39807b5cdef5aa55bafa6b2da729358bed4fdc34a0edbfa9d52a9fbb207ea22
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file is an Excel 4.0 macro-enabled document. Heuristics indicate the presence of legacy Excel formula macros, specifically mentioning 'Poppy by VicodinES' and 'Narkotic Network', suggesting a known macro-based malware. The macro likely attempts to download and execute a secondary payload, a common technique for distributing further malware or conducting phishing attacks.

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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