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

Static analysis result for SHA-256 3c954f3015826d77…

MALICIOUS

Office (OOXML) / .XLSX

614.0 KB Created: 2022-08-10 18:51:50 UTC Authoring application: Microsoft Excel 16.0300
MD5: f1e88cd1c5c9181d9aa12f53a500586d SHA-1: 86509ab342cacefed161a53e96cf0860a1661da0 SHA-256: 3c954f3015826d776f2d2558b6f72ad0913ee3f3f0c28743b965b68af3a87339
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking

The file is an Excel spreadsheet containing an embedded OLE object identified as Equation Editor. This is a high-severity finding and a common technique used to exploit vulnerabilities in Microsoft Office applications. The embedded object is likely a malicious payload designed to be executed when the document is opened or interacted with. No specific family could be identified, but the technique is well-established for initial compromise.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/xz.uYqCip9 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
9d2787826d6e0b89a9318488167960026534a7ae4d659f739c66d4e7a74495a0		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/xz.uYqCip9 844800 bytes
ooxml_oleobject_00_ole10native_00.bin
c3acf0ed37827f40659b14581b478a7dacf90f53edcdf3486e2e6853bd189670		 ole-package OOXML xl/embeddings/xz.uYqCip9 Ole10Native stream: oLe10naTivE 835734 bytes

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