Office (OOXML) malware analysis — malicious · 451dea9ed2bf5a78

MALICIOUS

Office (OOXML)

690.5 KB Created: 2020-10-06 14:24:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2020-10-09

MD5: 0f789fec568d178991262ad8d886aeb3 SHA-1: c6d1f01ec0c8cfb1eccffdc72ab5c5cc8acce971 SHA-256: 451dea9ed2bf5a787420220a9713aae4fea829095569c7b56cbbca59168a4089

204 Risk Score

Heuristics 5

ClamAV: Win.Dropper.Nanocore-10024287-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Dropper.Nanocore-10024287-0
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 4

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	937472 bytes
SHA-256: `86ccf1a988724dea0382a76a78c56751478f3bc6d6979d71d4e2f0b9e1f0ca6e`
Detection ClamAV: Win.Dropper.Nanocore-10024287-0 Obfuscation or payload: likely Carved artifact entropy is 7.45, consistent with packed or encrypted content.
`ooxml_oleobject_00_ole10native_00.bin`	ole-package	OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native	927709 bytes
SHA-256: `6271204feab95a9f2c4f785ca05da70f6ddb7e994d4fa155801e68b201236ff9`
Detection ClamAV: Win.Dropper.Nanocore-10024287-0 Obfuscation or payload: likely Carved artifact entropy is 7.51, consistent with packed or encrypted content.
`ooxml_oleobject_00_ole10native_00_Ever_Rose_Company_Profile.exe`	ole-package-payload	OOXML word/embeddings/oleObject1.bin Ole10Native payload: display_name=Ever Rose Company Profile.exe; full_path=C:\Users\SUCCESS\AppData\Local\Temp\Ever Rose Company Profile.exe; temp_path=; def_file=	927232 bytes
SHA-256: `d2723dfd8790570cf74a1a781ff24e968e6960cbde5ee46ae0db2884ffb42219`
Detection ClamAV: Win.Dropper.Nanocore-10024287-0 Obfuscation or payload: likely Carved artifact entropy is 7.51, consistent with packed or encrypted content.
`emf_00.emf`	ooxml-emf	OOXML EMF part: word/media/image1.emf	5440 bytes
SHA-256: `c68e80ae94e756203f5b6bfb1843b6406f57a8df2e87974a904aad9672b06c2f`

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