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

Static analysis result for SHA-256 920b5866086377ae…

MALICIOUS

Office (OOXML) / .XLSX

11.1 KB Created: 2023-09-05 08:35:25 UTC Authoring application: WPS Spreadsheets First seen: 2026-06-10
MD5: 838cc18c040948dd812277cbb4c19b06 SHA-1: 92d3e6b07f3d99b8982398fb340ea68049867cc7 SHA-256: 920b5866086377aeb1fc0a7ba8c72395cd994d3717d3e6a540db015c150a3c9f
100 Risk Score

Heuristics 3

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/oleObject1.bin contains the Equation Editor CLSID, the legacy component exploited by CVE-2017-11882, CVE-2018-0802, and CVE-2018-0798.
  • CVE-2018-0798 — anomalous Equation Editor native stream high CVE likely CVE_2018_0798_EQUATION_NATIVE_ANOMALY
    Embedded Equation Editor OLE data contains anomalous native stream bytes consistent with a CVE-2018-0798-style Equation Editor exploit. This is treated as likely CVE evidence because the Equation object is malformed and payload-like, but it does not match the exact public matrix-overflow byte signature.
  • 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 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/oleObject1.bin 3584 bytes
SHA-256: e640fa6a18ec6831254752c9821cf7dd17de9c2f0d3d700606edd0c1df97422b
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML xl/embeddings/oleObject1.bin Ole10Native stream: OLE10NATIvE 1480 bytes
SHA-256: 10b05eaa37e7617c6f884e9e23377ee277ee4e64b166b2d2482a574fa586a233

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