Office (OOXML) / .XLSX malware analysis — malicious · 2b4505f79755c3d3

MALICIOUS

Office (OOXML) / .XLSX

3.49 MB Created: 2025-10-08 01:54:00 UTC Authoring application: Microsoft Excel 12.0000

MD5: e3713933ac1af99922a477d7e83860c5 SHA-1: 7eb6d623b64f165813db9ab8113e1538290b3dd6 SHA-256: 2b4505f79755c3d3a80e6e3ac1e20a0018bc8341865ce52ea31d0b1300eef2cc

80 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The sample is an Excel file containing an embedded OLE object, specifically identified as an Equation Editor object. Heuristics indicate a lure to enable macros or editing, a common technique for malware droppers. The embedded OLE object is the primary indicator of malicious intent, likely serving as a secondary payload or exploit.

Heuristics 3

Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR

Embedded OLE object xl/embeddings/EcNyW0c.lx1W 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
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ooxml_oleobject_00.bin` `523921809df1d8b0f696544a06ce90c2df2d981fef49b337b709163ef13e986a`	ooxml-ole-object	OOXML embedded OLE part: xl/embeddings/EcNyW0c.lx1W	3051520 bytes

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