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

Static analysis result for SHA-256 6b7e5442896b100d…

MALICIOUS

Office (OOXML) / .XLSX

2.95 MB Created: 2025-09-10 01:57:00 UTC Authoring application: Microsoft Excel 15.0300
MD5: 3f8d2236d94b86a26f159b218c465735 SHA-1: 2b4bffd39985a71749458960e32080f8b5897c60 SHA-256: 6b7e5442896b100d152620c99145bde483c51524d6104fcfefa0014f72bdcc3c
60 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an Excel document containing an embedded OLE object identified as an Equation Editor. This is a high-severity finding, indicating a likely attempt to exploit a vulnerability within the Equation Editor to achieve code execution. The embedded object is substantial in size, suggesting it may contain a malicious payload.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/0qL1u8.5DxF4tI 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
cafdbc9e55d785b380926f3a8e775afb553ca5b26bf62821d39e92591abdc57b		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/0qL1u8.5DxF4tI 3066880 bytes
ooxml_oleobject_00_ole10native_00.bin
a6a06c9288df30464aa1f05fd52c767d32c2af9e3e1e497b2178fd4c0db43938		 ole-package OOXML xl/embeddings/0qL1u8.5DxF4tI Ole10Native stream: oLe10natiVE 3040465 bytes

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