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

Static analysis result for SHA-256 2cb9afa1ebb937a2…

MALICIOUS

Office (OOXML) / .XLSX

725.2 KB Authoring application: Microsoft Excel 12.0000
MD5: a51f577b2a9864f9b24b6ba7fd8f8f65 SHA-1: f80c72616b0efe87fc906c7fa715c9cdd99d7e7c SHA-256: 2cb9afa1ebb937a280aade76cba3892adbc8c939520ef8aeb0f6e558d442d103
60 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1559.001 Component Object Model Hijacking

The file is an Office document containing an embedded OLE object, specifically identified as a Microsoft Equation Editor object. This type of object is known to be vulnerable to code execution exploits. The presence of this object strongly suggests an attempt to leverage a vulnerability within the Equation Editor to achieve arbitrary code execution.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/JxhoA0tR.w8pX 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
8a055e0018fdf8966e05babf666cee4a6c6756becce94d9bacfa6d40a44a9647		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/JxhoA0tR.w8pX 1002496 bytes
ooxml_oleobject_00_ole10native_00.bin
3ec6445eb507ddc0f8d640648cbc521ee8bfb607a42a9579261db074dac2204e		 ole-package OOXML xl/embeddings/JxhoA0tR.w8pX Ole10Native stream: OlE10naTIve 992126 bytes

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