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

Static analysis result for SHA-256 fe789b8d5957c66d…

MALICIOUS

Office (OOXML) / .XLSX

1.97 MB Created: 2025-06-12 01:12:31 UTC Authoring application: Microsoft Excel 12.0000
MD5: 30070606c328564946bd41b8305a2b1b SHA-1: 0b203fb0ded8a2ef231e05fd92a8f2614296667e SHA-256: fe789b8d5957c66dd13722a3b4f0f5c751f87e082a40581785374a25ab7cb9c7
60 Risk Score

Malware Insights

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

The sample is an Excel file containing an embedded OLE object identified as an Equation Editor. 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/VH47bPfW.8O 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
ff017f245194fc55fd5915cb6ace75ec2ed913b81f69a69b17faf3540443d7cd		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/VH47bPfW.8O 2777088 bytes
ooxml_oleobject_00_ole10native_00.bin
95f83d87777c473f560ba091133bd4d6bcbd8f51f5f846a7df8118914a260348		 ole-package OOXML xl/embeddings/VH47bPfW.8O Ole10Native stream: oLe10natIVe 2752980 bytes

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