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

Static analysis result for SHA-256 c3a18e5b06fbe8f4…

MALICIOUS

Office (OOXML) / .XLSX

655.1 KB Created: 2023-07-26 19:45:53 UTC Authoring application: Microsoft Excel 12.0000
MD5: 08abe64dfddde3d990d035f4176e3fe5 SHA-1: f81cff392654c532489c43652d41d774f31e4ee4 SHA-256: c3a18e5b06fbe8f4bafe3ee146144d8fa0e6a7fd2ae3f518bf542d32fe064a48
60 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file is an OOXML document containing an embedded OLE object, specifically identified as an Equation Editor object. This strongly suggests exploitation of a known vulnerability within the Equation Editor component to achieve arbitrary code execution. The embedded object's filename is noted as an IOC.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/oktGeEeaA.xU7iz 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
218e41f568d88d1a783841750098f398f31b77f2f803846a327462d7aeeba621		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/oktGeEeaA.xU7iz 937472 bytes

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