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

Static analysis result for SHA-256 592bae57c2f6b0d4…

MALICIOUS

Office (OOXML) / .XLSX

748.4 KB Created: 2023-11-17 18:26:59 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2024-08-06
MD5: e037ed803c7d93609dbecef210fc37c1 SHA-1: d9a9bb6dc1c8e9f59066f79f828a86879db1c9b9 SHA-256: 592bae57c2f6b0d4df9ed7d48f87e5690d3b9a10768b3a7540ee89edb94bf994
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking

The file is an Office Open XML spreadsheet containing an embedded OLE object, specifically identified as an Equation Editor object. This is a known vector for delivering malicious payloads. The document body contains financial data, likely a lure to encourage opening the embedded object. No scripts were extracted, and the primary threat appears to stem from the embedded OLE object itself.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/jBkfoZuZ.jAjCFyW 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
9eef6f012b14f75399f46a49d7fcef7ec5873faed222994bc03731a030da2a13		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/jBkfoZuZ.jAjCFyW 1048064 bytes
ooxml_oleobject_00_ole10native_00.bin
6736b2b0c3f2c7e194efea480cb2cb5a716bdd9b3f21038a5e941ef508716b3f		 ole-package OOXML xl/embeddings/jBkfoZuZ.jAjCFyW Ole10Native stream: Ole10naTivE 1037759 bytes

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