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

Static analysis result for SHA-256 515eb49efbbe1af3…

MALICIOUS

Office (OOXML) / .XLSX

588.9 KB Created: 2023-09-27 08:05:40 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2023-10-07
MD5: eb3083d315db0aaca42f1530c9cc9cc6 SHA-1: 874687d1b95ab5e40d21e8f36d2d487787e232f7 SHA-256: 515eb49efbbe1af396aba6b66f949fb4e26fae7ac72edb359c253cdf22b58cbb
60 Risk Score

Malware Insights

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

The file contains an embedded OLE object, specifically identified as a Equation Editor object. This strongly suggests an exploit targeting a known vulnerability within the Equation Editor component of Microsoft Office. The embedded object is likely a secondary payload designed to be executed upon exploitation.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/muXSUYeNJ.ri 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
1314e8e7279ca3bca9f38ee9803274adf4a8f60a6c2b35de33887a8486e275d7		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/muXSUYeNJ.ri 818688 bytes
ooxml_oleobject_00_ole10native_00.bin
d56c51c8e06cdf98f918d02346640693e5cec46229bb05ace1be9fda2a237a39		 ole-package OOXML xl/embeddings/muXSUYeNJ.ri Ole10Native stream: ole10natIVe 809474 bytes

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