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

Static analysis result for SHA-256 059792fcecfe9c06…

MALICIOUS

Office (OLE) / .DOC

214.0 KB Created: 2020-04-07 08:55:27 Authoring application: Microsoft Excel
MD5: afb34067de829d032db96debb24135f2 SHA-1: aec39c9d7f81aef3e6ca8b043cb2e9dbb1fdfbac SHA-256: 059792fcecfe9c0608849bc86eb06f3a8018faee9475dd4becc6db6d89852431
142 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1203 Exploitation for Client Execution

The file contains Excel 4.0 macros, specifically an Auto_Open defined name, which is a critical finding indicating potential for arbitrary code execution. The presence of a dangerous formula API like RUN further supports this. No specific family could be identified, but the technique strongly suggests a downloader or initial execution stage.

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.
  • 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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.microsoft.com/photo/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
f451f5d6f627c0fd3e2c7bf500d083f911bb9f306f08556f747503c14b0c9562		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 55235 bytes

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