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

Static analysis result for SHA-256 c41ea7d33aa117c5…

MALICIOUS

Office (OOXML) / .XLSX

2.11 MB Created: 2025-06-12 01:12:31 UTC Authoring application: Microsoft Excel 12.0000
MD5: 06a0ed2c0b48a4d21f70e163014b610f SHA-1: 78ad0cadd54ea8ba97016f7fe11f103b3fbb6f95 SHA-256: c41ea7d33aa117c54b182d228147192f2ae493490d6adf4b14e8a7d9597f2f29
60 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The file is an Excel spreadsheet containing an embedded OLE object, specifically identified as an Equation Editor object. This object is a known vector for exploiting vulnerabilities, such as CVE-2017-11882, to execute arbitrary code. The presence of this object strongly suggests an attempt to exploit this vulnerability for initial access or payload delivery.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/uAgo8yA.sazcsc6 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
3ba430fb967bf652c3e8ccf6c34110f2023ac91d6df54579d49a73427eadab39		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/uAgo8yA.sazcsc6 2970624 bytes
ooxml_oleobject_00_ole10native_00.bin
a6bd4f01fe420b88dc14e5a1d4958c85ecdd9aeef60ec219f284e2352efe9046		 ole-package OOXML xl/embeddings/uAgo8yA.sazcsc6 Ole10Native stream: Ole10native 2944534 bytes

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