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

Static analysis result for SHA-256 840d8b532c256007…

MALICIOUS

Office (OOXML) / .XLSX

2.14 MB Created: 2025-06-12 01:12:31 UTC Authoring application: Microsoft Excel 12.0000
MD5: 800b706fed0657c663f84bfc74819d73 SHA-1: aad742b9196cf85ec12c131ae14d7eb6f8f49328 SHA-256: 840d8b532c256007939a1b8cd855462098a5c5c8715744f7bc82e68d1326324f
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 file is designed to exploit a vulnerability within that component. This is a common technique for delivering a secondary payload. No further IOCs were extracted from the provided evidence.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/RwjBL.56 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
9958559837e2f9efb4a7cfbf2e6b1a97141debb4c3fe92ee746173a095a1398e		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/RwjBL.56 3072000 bytes
ooxml_oleobject_00_ole10native_00.bin
b1c6f867332d1d7ded284887e2995029c01c18bfb62a727a223bc8569a81aaaa		 ole-package OOXML xl/embeddings/RwjBL.56 Ole10Native stream: Ole10natIve 3045504 bytes

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