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

Static analysis result for SHA-256 2cb435ab1455064a…

MALICIOUS

Office (OOXML) / .XLSX

2.08 MB Created: 2025-06-12 01:12:31 UTC Authoring application: Microsoft Excel 12.0000
MD5: 78abd366de8ded0d066b7a3b03bad205 SHA-1: f37669438c206dafa1e968e79c69e062da771a8d SHA-256: 2cb435ab1455064a8db5d10c812b551cc2c1901f5532858c524be4a76864bbff
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. This is a high-severity finding, indicating a likely attempt to exploit vulnerabilities within the Equation Editor component to execute arbitrary code. The embedded object is the primary indicator of malicious intent.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/U3.xH 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
6fdad0dc21e1bd3f91d054c743ce253bed6154a6c24e72d5550a9b4c799dea05		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/U3.xH 2903040 bytes
ooxml_oleobject_00_ole10native_00.bin
ba1b12749c7c226c8f2bbc25dc854e95aa7fecbdccf030f11ba1057b090a8bed		 ole-package OOXML xl/embeddings/U3.xH Ole10Native stream: ole10NatiVE 2877620 bytes

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