Office (OOXML) / .XLSX malware analysis — malicious · e25acc343e112b56

MALICIOUS

Office (OOXML) / .XLSX

1.54 MB Created: 2021-09-22 12:07:42 UTC Authoring application: Microsoft Excel 12.0000

MD5: 3f92948ed6eb89af2861d6613ad26a43 SHA-1: 5a5f1a0754f2105e91109ed9c0699db8410d9c44 SHA-256: e25acc343e112b56ab0e2b955e538d792fa6dc04437c22460fbf0a8be72328bf

62 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. This is a common technique used to exploit vulnerabilities in Microsoft Office applications, often leading to the execution of arbitrary code. No document body or scripts were extracted, limiting further analysis of the specific payload or delivery mechanism.

Heuristics 3

Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR

Embedded OLE object xl/embeddings/nXfw4xw.iB4 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` `c20e047eb9003f69ff71897b83f0bbcc498a9b1a204d6c6e6e660b9ed845480c`	ooxml-ole-object	OOXML embedded OLE part: xl/embeddings/nXfw4xw.iB4	1951744 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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