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

Static analysis result for SHA-256 eab869eef3b58626…

MALICIOUS

Office (OOXML) / .XLSX

690.4 KB Created: 2023-08-03 11:34:29 UTC Authoring application: Microsoft Excel 16.0300
MD5: 404eec23afb533475c11493f7d367ec0 SHA-1: 844ba233d3ba4ecc44596bc78f90eecffd0286de SHA-256: eab869eef3b586266919e8d303d196beeb0f22d3f3cbc7b1f521a7e67acd4cf5
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking

The XLSX file contains an embedded OLE object identified as an Equation Editor. This is a common technique used to exploit vulnerabilities in Equation Editor to execute arbitrary code. The presence of this object strongly suggests the file is a malicious dropper or exploit container.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/xswF4oc.okQv8 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
9deda92f8fb31de08715f62f0e03347668a8826f735b56b972c9d71f4934cda3		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/xswF4oc.okQv8 996864 bytes
ooxml_oleobject_00_ole10native_00.bin
cdd60a1f5e06c1831d57a399c94bbadc4c6396a7b0fcd16f9697f90f6b2af904		 ole-package OOXML xl/embeddings/xswF4oc.okQv8 Ole10Native stream: ole10NaTiVE 986295 bytes

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