Office (OOXML) / .XLSX malware analysis — malicious · 6c1cc9a94713e2b6

MALICIOUS

Office (OOXML) / .XLSX

1.44 MB Created: 2022-11-21 03:38:49 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2023-05-26

MD5: e4b887700182f9a35b843b9dc76910d7 SHA-1: 6f6b3b9daa6f92129db1222680e9a2ed549adf51 SHA-256: 6c1cc9a94713e2b614dcd99baa05c62f7cab2bb8abdb030b85a1dc539eb21dbc

62 Risk Score

Malware Insights

MITRE ATT&CK

T1559.001 Component Object Model and Distributed Component Object Model

The sample is an OOXML file containing an embedded OLE object identified as an Equation Editor. This is a common technique used to exploit vulnerabilities or deliver secondary payloads. The presence of the Equation Editor OLE object is a strong indicator of malicious intent, likely for exploitation or malware delivery.

Heuristics 3

Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR

Embedded OLE object xl/embeddings/XRfdTf.Az5Fw 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` `9bd8632d4800352f28b3d9377b6693483b7bbaa6b6c4e80a89dfc54ea7961336`	ooxml-ole-object	OOXML embedded OLE part: xl/embeddings/XRfdTf.Az5Fw	1817600 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.98, consistent with packed or encrypted content.

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