Office (OOXML) / .XLSX malware analysis — malicious · 1ebf2ee31466e565

MALICIOUS

Office (OOXML) / .XLSX

952.8 KB Created: 2015-06-05 18:17:20 UTC Authoring application: Microsoft Excel 16.0300

MD5: 9cf2038d451528fc19feb24ed6f5fb0c SHA-1: b0abebedf60dad10909d7234a9cf7e4dafc4e6a2 SHA-256: 1ebf2ee31466e565081dd91ddc57c39216b1c0a416b88bb4c44470ba6c0a2ffb

103 Risk Score

Malware Insights

MITRE ATT&CK

T1559.001 Component Object Model Hijacking

The primary indicator of maliciousness is the presence of an embedded OLE object, identified as an Equation Editor object. This is a common technique used to exploit vulnerabilities in Microsoft Office applications. No specific malware family could be identified from the static analysis alone.

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` `296d0d9f7f859516efe01bed03ec100f572ed8f95eac8a54b8a5fdb324ccb491`	ooxml-ole-object	OOXML embedded OLE part: xl/embeddings/oleObject1.bin	974848 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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