Xls.Dropper.Agent-7144259-0 — Office (OLE) malware analysis

Static analysis result for SHA-256 5fee8452a1e7caf1…

MALICIOUS

Office (OLE)

74.5 KB Created: 1996-12-17 01:32:42 Authoring application: Microsoft Excel First seen: 2020-09-24
MD5: dc5e557258f141d240e0470e97670dd2 SHA-1: 743beb457aa63de7157703add893dd37571c9848 SHA-256: 5fee8452a1e7caf16b0ef7e7cf953137c22dffecf8fed39783b75c65eb0cdfe7
140 Risk Score

Malware Insights

Xls.Dropper.Agent-7144259-0 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic

The file is identified as an Excel 4.0 macro sheet (XLM) containing a legacy Excel formula macro virus. Heuristics indicate it's designed to infect other workbooks, specifically saving an infected copy as 'Book1.xls' in the XLSTART directory. The embedded text suggests it's a dropper for a payload, potentially a computer virus, with references to 'Poppy by VicodinES' and 'The Narkotic Network 1998'.

Heuristics 3

  • ClamAV: Xls.Dropper.Agent-7144259-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Dropper.Agent-7144259-0
  • 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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