Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 480c95e2ee91b5db…

MALICIOUS

Office (OOXML)

346.9 KB Created: 2020-10-24 17:20:00 UTC Authoring application: Microsoft Office Word 14.0000 First seen: 2020-10-31
MD5: 63e88a855daa94f589a3a3b6cf6bdc81 SHA-1: f68b14e5a50ae0ea9ddacec938cf229aeba79a16 SHA-256: 480c95e2ee91b5dbabb994e05b14e3c83f327c0d97fd9d643821b1950157eb6c
84 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a malicious OOXML document containing an embedded OLE object. This object is identified as a risky file package that drops an auto-executable payload, specifically a JAR file. The presence of this embedded object strongly suggests an attempt to execute a secondary 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.microsoft.com/office/word/2010/wordprocessingCanvas In document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/markup-compatibility/2006In 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.microsoft.com/office/word/2010/wordprocessingDrawingIn 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/2010/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroupIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInkIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShapeIn document text (OOXML body / shared strings)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject1.bin 342016 bytes
SHA-256: f4a4ff2eadd08df92d362f1ed2124bf765b8c13852642b2ea6263ee2c6f89a62
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.98, consistent with packed or encrypted content.
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 336452 bytes
SHA-256: 4f612227ee91e17e3a63b567d54f34436e15a2bc3d22cd57b247ffbf7b324527
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 8.00, consistent with packed or encrypted content.
ooxml_oleobject_00_ole10native_00_87441352727628195214482755737571662679735545138114.jar ole-package-payload OOXML word/embeddings/oleObject1.bin Ole10Native payload: display_name=87441352727628195214482755737571662679735545138114.jar; full_path=C:\Users\TESTER\AppData\Local\Temp\87441352727628195214482755737571662679735545138114.jar; temp_path=; def_file= 335756 bytes
SHA-256: 87140dc6d7605c562d3b63c7479505b1acb09b4f160f6897162c1f330a03f154
emf_00.emf ooxml-emf OOXML EMF part: word/media/image2.emf 5132 bytes
SHA-256: a30f51a0c7c52c7f19c6909a25699eb4c711d548e72acfb05f47fd78e76f69a2

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