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

Static analysis result for SHA-256 fd3e300477ff2a03…

MALICIOUS

Office (OOXML) / .XLSX

639.0 KB Created: 2023-11-17 18:26:59 UTC Authoring application: Microsoft Excel 12.0000
MD5: 3bae1b825f7db82d4b09597835781b43 SHA-1: 92b6360141b4441dd2e743431e24751f0cb89c5d SHA-256: fd3e300477ff2a03c7e8c6b6046e40df131619a93cc19eb466334f3778453617
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking T1204.002 Malicious File

The sample is an Office Open XML (XLSX) file 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 execute arbitrary code. No scripts were extracted, and the document body was truncated, limiting further analysis of the payload delivery mechanism.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/vQpIZg.akA 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
58157c04c6c8070023283ed3a7fe0ef91f2b246627e2be792598982b3ba2a631		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/vQpIZg.akA 919552 bytes
ooxml_oleobject_00_ole10native_00.bin
1a325faed69d6e29794e9d59eedb0cb6728a86f0823ebfc9aa8aea0658cde6ad		 ole-package OOXML xl/embeddings/vQpIZg.akA Ole10Native stream: olE10nAtiVe 909478 bytes

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