Office (OOXML) / .XLSX malware analysis — malicious · ed75ee4787dc8969

MALICIOUS

Office (OOXML) / .XLSX

2.60 MB Created: 2025-09-04 00:14:20 UTC Authoring application: Microsoft Excel 12.0000

MD5: f5f0470acfd64bfb828e71eb2f3dc660 SHA-1: 19d423e48a92114fc2e6bce1509c3f6692db5ede SHA-256: ed75ee4787dc896947dff0c241e292639d107d94eef9efdf36b60550cd899f25

80 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file is an Excel spreadsheet containing an embedded OLE object, identified as an Equation Editor exploit. The heuristic 'SE_ENABLE_LURE' indicates that the document likely prompts the user to enable macros or content, a common tactic for malware droppers. The presence of the embedded OLE object strongly suggests it is the mechanism for delivering a secondary exploit or payload.

Heuristics 3

Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR

Embedded OLE object xl/embeddings/iFrK.Eox2 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` `68fbc86d2865dc1b621539610d7a376a63eacc63e9bbcf928c26d0fa9df7b9d9`	ooxml-ole-object	OOXML embedded OLE part: xl/embeddings/iFrK.Eox2	3058688 bytes

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