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

Static analysis result for SHA-256 1af512a8e608a8a2…

MALICIOUS

Office (OOXML) / .XLSX

684.8 KB Created: 2023-08-03 11:34:29 UTC Authoring application: Microsoft Excel 16.0300
MD5: eafadfe532c643c4bd655014e977e824 SHA-1: 20c56a329723f73f453229a17b44b00def085e02 SHA-256: 1af512a8e608a8a2623a406cafe1562ebf133de650630204f113f0167dbc02b7
60 Risk Score

Malware Insights

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

The file is an Excel document containing an embedded OLE object, specifically identified as a Equation Editor object. This strongly suggests exploitation of a known vulnerability within the Equation Editor component to execute arbitrary code. The embedded object is likely a secondary payload designed to further compromise the victim's system.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/TwVZ2.JBH7hK 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
ff6daafd02e7edeae9bc60803b5557c3f3e63cb720d79139b796dc508bf7c37a		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/TwVZ2.JBH7hK 962560 bytes
ooxml_oleobject_00_ole10native_00.bin
2520d14a35d230dad768863a1ce118e77b68a01846c1a706f74fb2c6d7315aae		 ole-package OOXML xl/embeddings/TwVZ2.JBH7hK Ole10Native stream: oLE10naTIve 952637 bytes

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