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

Static analysis result for SHA-256 1d63facaaea13ddf…

MALICIOUS

Office (OOXML) / .XLSX

1.99 MB Created: 2025-06-12 01:12:31 UTC Authoring application: Microsoft Excel 12.0000
MD5: ae52734870776aa51640134d0c272614 SHA-1: 5e4308f270f5241bc5294c3e8efadf51a174c2bd SHA-256: 1d63facaaea13ddfc0758d2c4ad99fb38b5e38c8fea27e2f4e0210b41674568b
60 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file is an Office Open XML spreadsheet 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. No further IOCs were extracted from this sample.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/jXCwitYt.a0DM1Qs 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
d7fcb205f7b45f387223bac05ed0f7463bca42836b6cacb1685492808e0a3132		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/jXCwitYt.a0DM1Qs 2793984 bytes
ooxml_oleobject_00_ole10native_00.bin
7064443d55ce4cf9aee1b44f0e9332bd83271f76f67bb916261eb0e586e22a2a		 ole-package OOXML xl/embeddings/jXCwitYt.a0DM1Qs Ole10Native stream: OLE10NATIVE 2769644 bytes

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