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

Static analysis result for SHA-256 f89dcd6035571585…

MALICIOUS

Office (OOXML) / .XLSX

736.3 KB Created: 2023-11-17 18:26:59 UTC Authoring application: Microsoft Excel 12.0000
MD5: d4a259e1c7ac1ffdc43a2b9d1ee36abd SHA-1: d173bfb9f00b57a4af21d766d6c653186f4cadfc SHA-256: f89dcd6035571585936910db7d8984ae3afd7cf2195d36786cc35d09f23fd2ac
62 Risk Score

Malware Insights

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

The file is an Office Open XML (XLSX) document containing an embedded OLE object. Heuristics indicate this object is specifically a Microsoft Equation Editor object, which is a known vector for exploiting vulnerabilities like CVE-2017-11882. The embedded OLE object, identified as 'xl/embeddings/XHUxv.JY7', is the primary indicator of this attack pattern. No scripts were extracted, and the document body was truncated, limiting further analysis of the payload.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/XHUxv.JY7 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
dc9ce654c16c227a9531d3a554329dc8aabcad1d1067f3b34067dd04ebe031d6		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/XHUxv.JY7 1072640 bytes
ooxml_oleobject_00_ole10native_00.bin
776a3d84142e5b807d1535247304b228f7f90b7a3453313a87742adeb49afa67		 ole-package OOXML xl/embeddings/XHUxv.JY7 Ole10Native stream: olE10naTIVE 1061799 bytes

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