Office (OOXML) / .XLSX malware analysis — malicious · 92d08e773a32afb2

MALICIOUS

Office (OOXML) / .XLSX

528.0 KB Created: 2006-09-16 00:00:00 UTC Authoring application: Microsoft Excel 12.0000

MD5: 48a3528b8f75b5cf76401df8e138db07 SHA-1: 1d3628ba1b4c3086a9bf96b6a2044bf65a6200b2 SHA-256: 92d08e773a32afb28f72b14eec7df5b0bf11aa9da8da025d2ede1178b7415a0b

62 Risk Score

Malware Insights

MITRE ATT&CK

T1559.001 Component Object Model Hijacking

The primary finding is the presence of an embedded OLE object, identified as an Equation Editor object. This is a high-severity heuristic indicating a common method for exploiting vulnerabilities within Microsoft Office documents. The embedded artifact 'ooxml_oleobject_00.bin' is flagged as suspicious due to high entropy, suggesting it likely contains a malicious payload. The file's structure and the nature of the embedded object point towards a delivery mechanism for further exploitation.

Heuristics 3

Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR

Embedded OLE object xl/embeddings/oleObject1.bin 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
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ooxml_oleobject_00.bin` `fae27aed939b2b6a7f5689a420801ce3da172a21f2f134b5345f4946cbae160e`	ooxml-ole-object	OOXML embedded OLE part: xl/embeddings/oleObject1.bin	492544 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 8.00, consistent with packed or encrypted content.

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