Office (OOXML) / .XLSX malware analysis — malicious · d3414438db691443

MALICIOUS

Office (OOXML) / .XLSX

270.5 KB Created: 2006-09-16 00:00:00 UTC Authoring application: Microsoft Excel 15.0300

MD5: 6b7b381f2e8355906a49071f611c0e80 SHA-1: d14255d60541538d04b00b844c18c51367bf5da0 SHA-256: d3414438db69144302c2951894b6355d90dbd527e01f1938a592691a8a779ec7

62 Risk Score

Malware Insights

MITRE ATT&CK

T1559.001 Component Object Model Hijacking

The primary finding is the presence of an embedded Equation Editor OLE object within the XLSX file. This object is frequently exploited to trigger vulnerabilities in Microsoft Office, leading to the execution of arbitrary code. While no specific payload or script was directly extracted, the nature of the embedded object strongly suggests an attempt to exploit the user or the application to download and execute a secondary malicious payload.

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` `f978e0d90c79067df238d56b4fac2e443223de3a5a537aff9e5d895b44ec495f`	ooxml-ole-object	OOXML embedded OLE part: xl/embeddings/oleObject1.bin	215040 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.

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