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

Static analysis result for SHA-256 4411371ce955846e…

MALICIOUS

Office (OOXML) / .XLSX

11.4 KB Created: 2006-09-16 00:00:00 UTC Authoring application: Microsoft Excel 12.0000
MD5: 342b17851be3ff08ebeb01c0701c85a5 SHA-1: a85b6c1c130d0ba986a9d69d1379e6fe7fa1d185 SHA-256: 4411371ce955846ef4feb5a2e1888f670054ba0311b1ca388b094fcfe7f78b84
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 a Microsoft Equation Editor object. This strongly suggests exploitation of a known vulnerability within the Equation Editor component to achieve arbitrary code execution. No further IOCs were extracted from this sample.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/oleObject1.bin 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
c43dbec1b747a0af8eae08dfb8bd3f89eb3e342873d8d9330447d43d7ab071e0		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/oleObject1.bin 6656 bytes
ooxml_oleobject_01.bin
4195f6d556a5f5e9a7dde6a0141b4b73c5b6950f6cb778afaa7e5c9b5d4ba0dd		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/oleObject2.bin 6656 bytes

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