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

Static analysis result for SHA-256 a071a30df1a3fde3…

MALICIOUS

Office (OLE) / .DOC

241.0 KB Created: 2020-04-17 06:37:08 Authoring application: Microsoft Excel
MD5: 121ac1cc8853bf7445faa7997f53549a SHA-1: 2de71d4b1014e3c1cc5e09456d3e9f1e56470868 SHA-256: a071a30df1a3fde3c6411b1d39b0be71ac931d5fd1d7506becb3479908cd23dc
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is an Excel 4.0 macro sheet, indicated by the OLE_XLM_AUTOOPEN heuristic. The OLE_XLM_DANGEROUS_FN heuristic specifically flags the use of dangerous API functions within the Auto_Open macro, suggesting an intent to execute arbitrary code. No specific malware family could be identified, and no external IOCs were extracted.

Heuristics 3

  • XLM Auto_Open with dangerous formula APIs high 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
9efc04421203ca848e951cfd8c932f205dd8e5d40818992b160e3382e49f5e84		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 140278 bytes

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