Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 89d4eec58886cfd5…

MALICIOUS

Office (OLE)

32.0 KB Created: 2010-05-17 07:16:18
MD5: fca2b27e16542ed73beb558c949d9a01 SHA-1: 975445b6f67ce7426c794592d400b8751f68f396 SHA-256: 89d4eec58886cfd57a1f3e3f232b45b1c83974b6c02cbda8020879b063940411
200 Risk Score

Malware Insights

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

The file is an Excel 4.0 macro sheet, identified by multiple critical heuristics including OLE_XLM_AUTOOPEN and OLE_XLS_FORMULA_MACRO_VIRUS. The macro sheet contains references to 'Classic.Poppy by VicodinES' and 'Hydrocodone/APAP 10-650 For Your Computer', suggesting a payload delivery or infection attempt. The document body is formatted as a shipping confirmation, a common lure for malicious documents. The macro uses dangerous functions like RUN, indicating it attempts to execute arbitrary code.

Heuristics 4

  • Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAME
    oletools recovered an Auto_Open / Auto_Close entry from an Excel 4.0 macro sheet. The raw BIFF name can be tokenized or partially opaque to byte-string checks, but the recovered macro listing confirms the workbook has an XLM auto-execution entry.
  • XLM Auto_Open with dangerous formula APIs critical OLE_XLM_DANGEROUS_FN
    Excel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
b1ebec383f5740ef9a2eee8a28f584d3afd464eb04bb3208db6ed63667457f4e		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 9565 bytes

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