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

Static analysis result for SHA-256 971e2daca5513d70…

MALICIOUS

Office (OOXML) / .XLSX

671.3 KB Authoring application: Microsoft Excel 12.0000
MD5: 80422f16531f8c43944e04bf3538efdf SHA-1: f137aa50426c79fa8645d6bfc2610a98cf2c4fa3 SHA-256: 971e2daca5513d707e83bc64690d35a29a7c27d02fa0f1dce8b6694e79b9a65c
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 Office document 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 execute arbitrary code. While no scripts were extracted, the presence of the OLE object and its CLSID is a high-confidence indicator of a malicious exploit delivery mechanism. The document body appears to be a form for customer registration, likely a lure.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/e4dupn.FEbj8D 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
2d8df8bb6759ffbe74ade202378dffaa91564df367c7d4e3bbf206d4f13d9a4c		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/e4dupn.FEbj8D 892928 bytes
ooxml_oleobject_00_ole10native_00.bin
472224393f2780aa56f2eb0cabe972432fa92d763cf675e737644b282137a757		 ole-package OOXML xl/embeddings/e4dupn.FEbj8D Ole10Native stream: oLE10naTiVe 883698 bytes

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