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

Static analysis result for SHA-256 a743ae3d9d95d0fa…

MALICIOUS

Office (OOXML) / .XLSX

2.05 MB Created: 2025-06-12 01:12:31 UTC Authoring application: Microsoft Excel 12.0000
MD5: 7162e4863a94b3521e49661e2e764d6e SHA-1: 499c05d26d556999c345cd888151ddc9b4976caa SHA-256: a743ae3d9d95d0fa4c11ce577701b23f9c2bc9e365824bb107089da99ad1f475
60 Risk Score

Malware Insights

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

The high-severity heuristic firing for 'OLE_EQUATION_EDITOR' indicates the presence of a vulnerable Equation Editor OLE object within the Excel 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/PWy9.j0QZL0 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
39c08b7eabba460846c7ce92c12761bf6ff3c7e2c341be19e6372683e54d6f4a		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/PWy9.j0QZL0 2931712 bytes
ooxml_oleobject_00_ole10native_00.bin
0c4b37e0e5b288db0519fd1682e2c30874982ac2c752cea5f74a4c92650e8c98		 ole-package OOXML xl/embeddings/PWy9.j0QZL0 Ole10Native stream: OLE10natIVE 2906422 bytes

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