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

Static analysis result for SHA-256 1b6824dcc6734a96…

MALICIOUS

Office (OOXML) / .XLSX

2.89 MB Created: 2025-09-10 01:57:00 UTC Authoring application: Microsoft Excel 15.0300
MD5: 799408c89c2aa9d19549f39a09c338c2 SHA-1: a41d1be4190dab7afe47a4364106f7dc2ac089ef SHA-256: 1b6824dcc6734a968ca8746cc169f23d612b3c300dc927d1eead1d79af609651
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking

The high-severity heuristic firing for 'Equation Editor OLE object' indicates the presence of a malicious embedded object within the Excel file. This is a common technique used to exploit vulnerabilities in the Equation Editor component, often leading to the execution of arbitrary code. No specific family could be identified from the available evidence.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/S3D31Q.luw 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
7d5b038a99cfd2f1ed087905e3530ded098d0834b40f62e270c6a66028b029f9		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/S3D31Q.luw 3016192 bytes
ooxml_oleobject_00_ole10native_00.bin
fb2993a9e07897e08c8d6c0d948ab6948c80dc2e07619f30ff1a409009febac2		 ole-package OOXML xl/embeddings/S3D31Q.luw Ole10Native stream: OLe10NATIVE 2989839 bytes

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