Malicious Office (OLE) / .80 — malware analysis report

Static analysis result for SHA-256 feda0b193461eba9…

MALICIOUS

Office (OLE) / .80

44.0 KB Created: 2008-04-01 09:49:34 Authoring application: Microsoft Excel
MD5: a74f44e80d8eb6afddf17b08b4c45c6d SHA-1: 9d9d9da95237b750441b6c3c496be76e51a8d047 SHA-256: feda0b193461eba9367d91397dc537f30e4ec903df080ff3697289c801c673bd
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 (XLM) macro-enabled document. Heuristics indicate the presence of an Auto_Open macro, which is a common technique for executing malicious code upon opening the document. The macro sheet contains references to dangerous formula APIs, including 'RUN', suggesting it is designed to execute arbitrary commands. The presence of markers like 'Poppy by VicodinES' and 'Narkotic Network' indicates this is a known legacy macro virus. The document body appears to be a price list, likely a lure to entice users to open the malicious file.

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
2adb29b59ca5b5bb12c18c12ffbf07daa44fa1d5b63ae0153e7f8cda098d85c9		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 19638 bytes

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