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

Static analysis result for SHA-256 a986ef1f64a9f305…

MALICIOUS

Office (OOXML) / .XLSX

1.98 MB Created: 2025-05-19 13:24:44 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2025-05-20
MD5: d78bc644c65837b1105bf7f9d80ca7ab SHA-1: 1ce80ac95d978edfd61e6edadaffaf15c1f8d195 SHA-256: a986ef1f64a9f305fafa053dd1593ca32a3ad865da931b4ba62a84da8e14c2a3
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 common technique used to exploit vulnerabilities in the Equation Editor component to execute arbitrary code. The document body contains what appears to be a list of items and quantities, likely a lure to encourage the user to interact with the embedded object.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/f5aVSh9.Zjz 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
8f33d850b3b914c315f87ae4e190f625cd7902bee4f963842892c442d029677a		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/f5aVSh9.Zjz 2811392 bytes

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