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

Static analysis result for SHA-256 8bb812aa65ca3a33…

MALICIOUS

Office (OOXML) / .XLSX

2.88 MB Created: 2025-09-10 01:57:00 UTC Authoring application: Microsoft Excel 15.0300
MD5: 1eede4635c7ad6ebaa3d31d4b79ee02e SHA-1: 3317832305bde7b29094aa23d8f42e57e8938595 SHA-256: 8bb812aa65ca3a3351fde193cbe0e0f07258f14d0ad62820c3615d2fe94d2228
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking

The sample is an Excel file containing an embedded OLE object identified as an Equation Editor object. This is a known method for exploiting vulnerabilities in Microsoft Office applications to execute malicious code. No further scripts or document body content were available for analysis.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/MbJP3CpC.IPva 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
7be9b06db58c79180ce24a8cd8577c0481e548bef1b4b3a82a7297e7be0ce1e8		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/MbJP3CpC.IPva 2915328 bytes
ooxml_oleobject_00_ole10native_00.bin
8490d7ae63b1639c7698540267b7f223adcfe51b1c873f614d291fb9b4112e38		 ole-package OOXML xl/embeddings/MbJP3CpC.IPva Ole10Native stream: OLe10naTIVE 2890046 bytes

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