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

Static analysis result for SHA-256 f389fa1b3c670b89…

MALICIOUS

Office (OOXML) / .XLSX

616.1 KB Created: 2023-08-03 11:34:29 UTC Authoring application: Microsoft Excel 16.0300
MD5: 7615cd8ee1b0352eb86ad7be16754d2e SHA-1: 601188bd783322d8ce7373c4177523708d95fb03 SHA-256: f389fa1b3c670b8985f34851fa490ed18ac2f0bea2166b734bc11ab01c1cb803
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking

The sample is an Office Open XML spreadsheet containing an embedded OLE object identified as an Equation Editor. This is a high-severity finding, indicating a likely attempt to exploit a vulnerability within the Equation Editor component to execute arbitrary code. No further details on the payload or specific exploit were extracted.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/pJBcKc.XD 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
647982c913bdb3d7d5d26396f9cb3f4a4bd9b49043b51c7622874e856237d4ed		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/pJBcKc.XD 901120 bytes
ooxml_oleobject_00_ole10native_00.bin
1839e5396a0f8c5b141324070daae8a8827686b46e73d701582a033db2e813c8		 ole-package OOXML xl/embeddings/pJBcKc.XD Ole10Native stream: olE10NATiVE 891576 bytes

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