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

Static analysis result for SHA-256 45bf1da3e5476a43…

MALICIOUS

Office (OOXML) / .XLSX

676.1 KB Created: 2023-08-03 11:34:29 UTC Authoring application: Microsoft Excel 16.0300
MD5: 3af0630eee4fe883de4302ec2d670102 SHA-1: 8bdd1ffde16832586856d4089f1ee6682220f72b SHA-256: 45bf1da3e5476a43b72059be486a332a4ad2be37be21e7ae9ed8b83174b541e8
60 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The high-severity heuristic 'OLE_EQUATION_EDITOR' indicates the presence of a vulnerable Equation Editor OLE object within the XLSX file. This object is commonly used to exploit CVE-2017-11882, allowing for arbitrary code execution when the document is opened. No other malicious indicators were found.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/dkOI0i.zA 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
5a14840a34b7906d92f707ba3307d80e87a0be6ebb0b24a99a9ff215c39a2a87		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/dkOI0i.zA 1000448 bytes
ooxml_oleobject_00_ole10native_00.bin
9fc32129b516e10ccb121892fee37ef4282f0a62321d8dafdbfd406570154eba		 ole-package OOXML xl/embeddings/dkOI0i.zA Ole10Native stream: Ole10NatIve 989745 bytes

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