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

Static analysis result for SHA-256 2dc9eff615621aaa…

MALICIOUS

Office (OOXML) / .XLSX

2.78 MB Created: 2025-09-10 01:57:00 UTC Authoring application: Microsoft Excel 15.0300
MD5: d79d00c508a7eafdbf0fc8eaa490dd21 SHA-1: dabc7e47a434a57ba0f0e0e2f18065f98be8a04c SHA-256: 2dc9eff615621aaa77f95a63254b84fde2d0a0aeeb4140e3f811efbfff5e265c
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking

The sample is an Excel file containing an embedded OLE object identified as an Equation Editor object. This is a common technique used to deliver exploits, such as CVE-2017-11882, which can lead to arbitrary code execution. The presence of this object strongly suggests an attempt to leverage a known vulnerability.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/1Pzllr.GIZ63T 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
00848689ca3d6aaf7a7d4971f22cb15bbac00f2534158793917d18245edd2bc5		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/1Pzllr.GIZ63T 2788352 bytes
ooxml_oleobject_00_ole10native_00.bin
31a3a20543ef525275924ace78d9d912421654fd576750d551d214ecbd03c86b		 ole-package OOXML xl/embeddings/1Pzllr.GIZ63T Ole10Native stream: OlE10NATivE 2764008 bytes

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