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

Static analysis result for SHA-256 8c2b92a7c8f97d59…

MALICIOUS

Office (OOXML) / .XLSX

655.3 KB Created: 2022-08-10 18:51:50 UTC Authoring application: Microsoft Excel 16.0300
MD5: 75b28d93089bfc0146819265ad912b34 SHA-1: 1f6e00bd9e97c02db06b5c10d3225ef4c81fe043 SHA-256: 8c2b92a7c8f97d598fe85a721f6dc6bc3385cdfcea533438728ba3f9f702778b
60 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1559 Component Object Model Hijacking T1559.001 Component Object Model Hijacking: Component Object Model Hijacking

The file is an Excel spreadsheet containing an embedded OLE object, specifically identified as an Equation Editor object. This strongly suggests the exploitation of a known vulnerability within the Equation Editor component to achieve arbitrary code execution. The embedded object's filename, 'pBgugzO.zge1m', is listed as an IOC. The likely intent is to download and execute a second-stage payload, although no scripts were directly extracted to confirm this.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/pBgugzO.zge1m 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
7eab7304e717ef3f5e027afaa6c2e6f547ec34dcdf57cae096884339b43b76b9		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/pBgugzO.zge1m 960000 bytes
ooxml_oleobject_00_ole10native_00.bin
5105e3c2210b8c88b27604608ca4ae61725157441d8f2d364ea2d9b30c964408		 ole-package OOXML xl/embeddings/pBgugzO.zge1m Ole10Native stream: OLe10naTIve 949810 bytes

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