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

Static analysis result for SHA-256 2ee8b8d4670f5d5e…

MALICIOUS

Office (OOXML) / .XLSX

2.85 MB Created: 2025-09-10 01:57:00 UTC Authoring application: Microsoft Excel 15.0300
MD5: de4797c3f4eeffb5897d5011c2502e86 SHA-1: fe920772e0dbf01f46dc04eb641336910a246cff SHA-256: 2ee8b8d4670f5d5eefce8057ebd3ebf3f7b8c9b456a55661118fc6dade573ea3
60 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file is an OOXML document containing an embedded OLE object, specifically identified as an Equation Editor object. This strongly suggests exploitation of a known vulnerability within the Equation Editor component to achieve arbitrary code execution.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/BNJaPDK.UB1PY 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
c4765ce4092949c8e812a210eeb5570f7523c496e69d4f8bf6c32ffbff43ace0		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/BNJaPDK.UB1PY 2885632 bytes
ooxml_oleobject_00_ole10native_00.bin
32d20b213d50a99ffb9906976e96b4add176da78a8a1e393c3157450b5c17a10		 ole-package OOXML xl/embeddings/BNJaPDK.UB1PY Ole10Native stream: OLe10nAtiVE 2860255 bytes

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