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

Static analysis result for SHA-256 c103ff6daaed1601…

MALICIOUS

Office (OOXML) / .XLSX

2.84 MB Created: 2025-09-10 01:57:00 UTC Authoring application: Microsoft Excel 15.0300
MD5: 0d80ca795263c91e9736c8218d40a0c1 SHA-1: 05b432d53ea79e22e420b184921edb3cb513044b SHA-256: c103ff6daaed16018630b4248df5bfee37327a8c3add6327071920a025e52a09
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking

The high-severity heuristic firing for an Equation Editor OLE object strongly suggests this XLSX file is designed to exploit a vulnerability within the Equation Editor component. This is a common technique for delivering secondary payloads, although no specific payload or exploit details were extracted from this sample.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/qV.Rr 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
6f9441c701246b159e54dc98a31eeec8824313c0dff2202936086a73e657828e		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/qV.Rr 2928128 bytes
ooxml_oleobject_00_ole10native_00.bin
7f34cad972ab3980a21514e738cd2d0c04a28bb06aab1e01b5fce253900dba79		 ole-package OOXML xl/embeddings/qV.Rr Ole10Native stream: oLE10nATIve 2903005 bytes

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