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

Static analysis result for SHA-256 4e26701343de9839…

MALICIOUS

Office (OOXML) / .XLSX

2.07 MB Created: 2025-06-12 01:12:31 UTC Authoring application: Microsoft Excel 12.0000
MD5: 8db2ce83f1d3ff98394370963bdcbaf5 SHA-1: c12b8f4ef243fcdd9a8f4521e661b546471ecb00 SHA-256: 4e26701343de98398da6dbbdfe3fbc05125747ee2cf91c2dc5faee00c1c1ceb7
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking

The high-severity heuristic firing for 'OLE_EQUATION_EDITOR' indicates the presence of a vulnerable Equation Editor OLE object within the XLSX file. This is a common technique used to exploit CVE-2017-11882 or similar vulnerabilities, leading to the execution of arbitrary code. The embedded OLE object itself is the primary indicator of compromise.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/mbzAmw3u.ZI5 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
ccb502c25489b1fc1acb7077c0db2811d30f1baa0469e9a5ce99e6dce3eab3b9		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/mbzAmw3u.ZI5 2985472 bytes
ooxml_oleobject_00_ole10native_00.bin
b76b946888cf079ed17353d8656eaadde8a98e512e36f1b1c776fece3e0f8dcd		 ole-package OOXML xl/embeddings/mbzAmw3u.ZI5 Ole10Native stream: OLE10nATive 2959504 bytes

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