Office (OOXML) malware analysis — malicious · 266c2d4ea4ece176

MALICIOUS

Office (OOXML)

175.5 KB Created: 2020-08-11 19:33:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2020-09-07

MD5: 042f3afb38e705fba588b630230496f3 SHA-1: 08d76ab8cab51f6b30e525064e370e4cc184a6ff SHA-256: 266c2d4ea4ece176a83038a325c515163472aaa76bc8345ccaa49957fc66cf4d

84 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1137.001 Office Application Build

The sample is a malicious OOXML document containing an embedded OLE object. This object is identified as a package that drops an auto-executable payload, specifically a JAR file. The presence of this embedded object strongly suggests an attempt to deliver a secondary malicious payload upon opening the document.

Heuristics 4

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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://schemas.openxmlformats.org/markup-compatibility/2006 In document text (OOXML body / shared strings)
- http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
- http://schemas.openxmlformats.org/officeDocument/2006/mathIn document text (OOXML body / shared strings)
- http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingIn document text (OOXML body / shared strings)
- http://schemas.openxmlformats.org/wordprocessingml/2006/mainIn document text (OOXML body / shared strings)
- http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ooxml_oleobject_00.bin`	ooxml-ole-object	OOXML embedded OLE part: word/embeddings/oleObject1.bin	166400 bytes
SHA-256: `1c439e0508f8c4f93671c8c093ae45d86bec336f8fb7fd2919bfee0e400ae1e8`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.96, consistent with packed or encrypted content.
`ooxml_oleobject_00_ole10native_00.bin`	ole-package	OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native	162507 bytes
SHA-256: `4b6fb5ccf60466c3f87fd4468d7509587883d6a40928c02a12312fdb2f6156cb`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.
`emf_00.emf`	ooxml-emf	OOXML EMF part: word/media/image2.emf	5164 bytes
SHA-256: `0f0616a08732ed30ae8f22a300975dd062f8454ecc2648549d8f0b1929911164`

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