Malicious Office (OOXML) / .XLSX — malware analysis report

Static analysis result for SHA-256 523f7483fdf82a84…

MALICIOUS

Office (OOXML) / .XLSX

2.11 MB Created: 2025-06-06 02:20:09 UTC Authoring application: Microsoft Excel 12.0000
MD5: 9b1cf791c4019ccc58a316445e7422b6 SHA-1: bff68aa294575b451870b1540def49f649b6b47e SHA-256: 523f7483fdf82a845d029718666906a6a646706fa32983a9c7cb84c69e86f4d4
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking

The sample is an Excel file containing an embedded OLE object identified as an Equation Editor object. This is a high-severity finding and a common technique used to exploit vulnerabilities in the Equation Editor component to achieve arbitrary code execution. The embedded object itself is listed as an IOC.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/IG6DCm.4KUv contains the Equation Editor CLSID, the legacy component exploited by CVE-2017-11882, CVE-2018-0802, and CVE-2018-0798.
  • Embedded OLE object medium OOXML_OLE_OBJECT
    Document contains an embedded OLE object

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
af3f817ca9f48f772358967a0d3768909ec3598e87dc7eefc36194876a96ef24		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/IG6DCm.4KUv 2998272 bytes

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