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

Static analysis result for SHA-256 19215023198d9ebe…

MALICIOUS

Office (OOXML) / .XLSX

653.3 KB Created: 2010-06-04 08:55:28 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2024-06-08
MD5: ddfba93d516fe962fc785056189afea7 SHA-1: 65197b03ded95c0664179c1f28637d5799ece267 SHA-256: 19215023198d9ebe4a626113cc6c001bd4d250ebea69aa25afd483aefd4c0984
100 Risk Score

Malware Insights

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

The file is an OOXML document containing an embedded OLE object, specifically identified as a Microsoft Equation Editor object. High-severity heuristics indicate that this Equation Editor object carries a payload-like Ole10Native stream with an anomalous header, suggesting it's designed to exploit a vulnerability. The embedded OLE object is the primary indicator of malicious intent, likely leading to the execution of a secondary payload.

Heuristics 3

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/6Q9fxjr.14Y contains the Equation Editor CLSID, the legacy component exploited by CVE-2017-11882, CVE-2018-0802, and CVE-2018-0798.
  • Equation Editor object carries payload-like Ole10Native stream high OLE_EQUATION_OLE10NATIVE_PAYLOAD_ANOMALY
    Embedded OLE object declares the Equation Editor CLSID but stores a large high-entropy Ole10Native stream with malformed package sizing. This is an exploit-shaped Equation/OLE payload container seen in malicious OOXML samples. It is not assigned to a specific CVE unless the MTEF/Equation Native primitive also matches.
  • 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
7343d03216dfa3badfd9cfe9aec8a7278e1dd86932364c82d08b48a168276a3c		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/6Q9fxjr.14Y 933888 bytes
ooxml_oleobject_00_ole10native_00.bin
b7e03ca96ce36311ac36f86970a6b110a611aee35112158702665ccdf5dfeed8		 ole-package OOXML xl/embeddings/6Q9fxjr.14Y Ole10Native stream: oLe10native 923782 bytes

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