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

Static analysis result for SHA-256 23157d14c24c14d7…

MALICIOUS

Office (OOXML) / .XLSX

2.42 MB Created: 2025-09-04 00:14:20 UTC Authoring application: Microsoft Excel 12.0000
MD5: ecfbe94a46aa283971c8c69b7b4f6e4f SHA-1: ea22194d51d0bcf00015f643fc371d9e9ba6e60c SHA-256: 23157d14c24c14d77ea6f4d1aa93c848169fe13a5be42f44f7ad3a1e340825cb
80 Risk Score

Malware Insights

MITRE ATT&CK
T1204 User Execution: Malicious File T1566 Phishing

The sample is an Office document that contains an embedded OLE object, specifically identified as an Equation Editor object. It also contains a heuristic firing indicating a lure to enable macros or content, a common tactic for malware droppers. No scripts were extracted, and no specific family could be identified.

Heuristics 3

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/Vm.5lm2 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.

FilenameKindSourceSize
ooxml_oleobject_00.bin
2c23ebfec661eb96588bd93a2d9a14f82be495abc824f4e55d16da3222ec3e4f		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/Vm.5lm2 3085312 bytes

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