Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 bdf075ed0a02c0e9…

MALICIOUS

Office (OLE)

168.5 KB Created: 2010-04-17 02:19:21 Authoring application: Microsoft Excel
MD5: c012eb198ee1ca4e6e37c3d85ba2e132 SHA-1: 859575dab2c4db91328beb7ffa8d1d37d52a32e5 SHA-256: bdf075ed0a02c0e97dc2bb16152175a5c19f67fbc75761784617f6e570308a85
200 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1027 Obfuscated Files or Information

The file is an Excel 4.0 (XLM) macro-enabled document. Heuristics indicate the presence of an Auto_Open macro that utilizes dangerous formula APIs, including RUN. The embedded script content and metadata explicitly mention 'XL4Poppy', 'Classic.Poppy by VicodinES', and 'The Narkotic Network', suggesting a known legacy macro virus. The script's intent is to execute embedded code, likely to download and run a second-stage payload. The document body content appears to be financial data, potentially used as a lure.

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
2dbc76167f4c28d54cfa4db094ce31e7f686d9be85a76247cae57887ecd63e61		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 103408 bytes

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