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

Static analysis result for SHA-256 1e060a448a102587…

MALICIOUS

Office (OOXML) / .XLSX

604.3 KB Created: 2010-06-04 08:55:28 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2024-05-27
MD5: b20a88c10e9965495f805d283d5bb10d SHA-1: 88f0c7280ecf29434b189c60cb3f4196d17b74a9 SHA-256: 1e060a448a102587340b02a5660d6e5f9d3e8d10233155b3dd5c4e2966d8865b
100 Risk Score

Malware Insights

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

The sample is an Office 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 size and entropy, strongly suggesting exploitation of a vulnerability within the Equation Editor. This points to a likely attack pattern involving the delivery of a secondary malicious payload.

Heuristics 3

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/QQGtU.1oTZ 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
60e875d5d65cd708e5fa95cb84f0c984f0838292f2df320c1efff695af8b29ec		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/QQGtU.1oTZ 866304 bytes
ooxml_oleobject_00_ole10native_00.bin
f64620104770ce66221bafa5b207f3bd385de1ebc0875621dda3c1cb852c103b		 ole-package OOXML xl/embeddings/QQGtU.1oTZ Ole10Native stream: OlE10Native 856816 bytes

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