Office (OOXML) / .XLSX malware analysis — malicious · cb9cc7841fdd46b1

MALICIOUS

Office (OOXML) / .XLSX

162.9 KB Created: 2022-07-04 07:18:56 UTC Authoring application: Microsoft Excel 14.0300 First seen: 2022-07-04

MD5: ea273838cc231f189370e3881dc318cb SHA-1: e350d073966c4d6306760671b68b38c7cb6d0584 SHA-256: cb9cc7841fdd46b14f48ac6f26836e7b38912b2c7a00d378837a8b92f55bdaba

82 Risk Score

Malware Insights

MITRE ATT&CK

T1559.001 Component Object Model Hijacking T1137.001 DLL Search Order Hijacking

The critical heuristic 'OFFICE_PACKAGE_RISKY_FILE' indicates that an embedded OLE object is designed to drop an auto-executable payload, specifically identified as a JAR file. The presence of multiple embedded OLE objects and a high-entropy carved artifact further supports the malicious nature of the file. The primary IOC is the name of the dropped OLE package.

Heuristics 3

Ole10Native package drops an auto-executable payload critical OFFICE_PACKAGE_RISKY_FILE

OLE Package displayName or fullPath ends in a directly auto-executable extension (a runnable binary or a script the default shell host runs on double-click). Embedding such a payload inside an Office document has no benign authoring use — it is a malware-delivery dropper.
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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ooxml_oleobject_00.bin` `4ee91f9a40d4f044bf446fd790a91d13ef9edc21f12b16381fd0de42346cfbf7`	ooxml-ole-object	OOXML embedded OLE part: xl/embeddings/Microsoft_Word_Document1.docx	136208 bytes
`ooxml_oleobject_01.bin` `47285ae482ad4117a5e463f33757692cec2d0e626e42fb14717b173163dea3a6`	ooxml-ole-object	OOXML embedded OLE part: xl/embeddings/Microsoft_Word_Document1.docx!word/embeddings/oleObject1.bin	115200 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.94, consistent with packed or encrypted content.
`ooxml_oleobject_01_ole10native_00.bin` `65f2e30ec4967e39ea0f5d03892a9d94f40aa2de8418e308fa06c268a324252e`	ole-package	OOXML xl/embeddings/Microsoft_Word_Document1.docx!word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native	111362 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.
`emf_00.emf` `16f7be246da923b464d9377040e049bd37a81a66de340e0a34ebdb3207c0e224`	ooxml-emf	OOXML EMF part: xl/media/image1.emf	139684 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.