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

Static analysis result for SHA-256 cf9b61c0116d5eaa…

MALICIOUS

Office (OOXML) / .XLSX

2.09 MB Created: 2025-06-12 01:12:31 UTC Authoring application: Microsoft Excel 12.0000
MD5: a965eb0506918b70faa36b1ba7a45a6f SHA-1: 7045b7c99b2b0826fc2cb0d46df270997048cb80 SHA-256: cf9b61c0116d5eaa0b523832762d936a848a424ee0e52d8fe3c78faeea50178d
62 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking T1204.002 Malicious File

The high-severity heuristic firing for an Equation Editor OLE object strongly suggests this XLSX file is designed to exploit a vulnerability within the Equation Editor component. This is a common technique for delivering secondary payloads, often leading to remote code execution.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/aK.wwTy 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
26eab1aade1fc7a992d08ec9dd163a7d2d9c153fc0fbc7961795e608f2910e4c		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/aK.wwTy 2979328 bytes
ooxml_oleobject_00_ole10native_00.bin
3bd0165b5df304316e96d44f19c496e3007da1d95e54d49077d0b8adc7daaecd		 ole-package OOXML xl/embeddings/aK.wwTy Ole10Native stream: ole10naTIVe 2953574 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.