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

Static analysis result for SHA-256 61d01d90485e1c1c…

MALICIOUS

Office (OOXML) / .XLSX

676.0 KB Created: 2023-07-26 19:45:53 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2023-09-26
MD5: a2990308cbc91021c484e4b8ad1eeb3d SHA-1: 83989d53d6286dbfd91dd5ec9fe6925d3a48d931 SHA-256: 61d01d90485e1c1ce31dcaa94057fd0f545d84b0560a039f4ab7a38f01c726f0
60 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file is an Office Open XML spreadsheet 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. No further details on the payload or specific exploit chain were extracted.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/6zd.WQN2C 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
64c358dd8c3ce01830d84b76683e3f6d3fc8230c27039723b9f156879dbd5849		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/6zd.WQN2C 1013760 bytes
ooxml_oleobject_00_ole10native_00.bin
dda5457b38a264da68ed91b8019b888701ea898b6b0b9e8496877572f8fbf334		 ole-package OOXML xl/embeddings/6zd.WQN2C Ole10Native stream: olE10Native 1003263 bytes

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