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

Static analysis result for SHA-256 c054d576bd0cbb6d…

MALICIOUS

Office (OOXML) / .XLSX

696.8 KB Created: 2020-05-18 06:42:12 UTC Authoring application: Microsoft Excel 15.0300
MD5: f9c0d1c69dbd21d9b47b0d1ff06bee43 SHA-1: 1906ad43ca783cf96fd823169bb80c1098e975a0 SHA-256: c054d576bd0cbb6dde7a140a82f1f50dd0302b8f303c038ecb2f2e491f62e114
66 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an XLSX file containing an embedded OLE object specifically identified as an Equation Editor object. This is a characteristic pattern for exploiting CVE-2017-11882, which is infraestructura for initial access and code execution. No scripts or document body text were extracted, limiting the a-posteriori analysis of the same payload's intent.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/6pz5x43r5.hWShN 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
7cd54504877769f54a65562f9b9d2beb92b107cb8e08f4ff1d9beccda5404cdc		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/6pz5x43r5.hWShN 872448 bytes

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