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

Static analysis result for SHA-256 be449cbe36ba90c8…

MALICIOUS

Office (OOXML) / .XLSX

2.47 MB Created: 2025-10-29 06:20:05 UTC Authoring application: Microsoft Excel 12.0000
MD5: 55a6647ab2b4dc1a5e74a1ff03465265 SHA-1: c3eb817d86f1b045f6db6907a3619579340b8b74 SHA-256: be449cbe36ba90c8a5c1095bc1f91781eeacd2adfe4855d0416ca1b655aadecb
60 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution

The sample is an Office document containing an embedded OLE object identified as an Equation Editor. This is a high-severity heuristic indicating a common method for exploiting vulnerabilities in Microsoft Office to execute arbitrary code. The embedded object is likely a malicious payload designed to be triggered upon user interaction or by exploiting a vulnerability within the Equation Editor component.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/URQ6fsYoX.VHMd 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
a7e817470403cad63ca3c796b86e3229c4306dafe2840cd13039b788c8356601		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/URQ6fsYoX.VHMd 3047936 bytes
ooxml_oleobject_00_ole10native_00.bin
d80a0146988ef818b72ab3d482177ac2e75c9bbba41b4eea80942520be4b19a4		 ole-package OOXML xl/embeddings/URQ6fsYoX.VHMd Ole10Native stream: OLe10NAtiVe 3021643 bytes

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