Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 144dc45233b2b42b…

MALICIOUS

Office (OOXML)

267.5 KB Created: 2021-02-19 18:38:00 UTC Authoring application: Microsoft Office Word 14.0000 First seen: 2022-06-20
MD5: 9ab0fbcc07eec5cdfe614bb0e70721e1 SHA-1: 6cc5702c0a8885761ea3c83d5020f25b19a0edf2 SHA-256: 144dc45233b2b42b2bd0fa2c42ace16bea045455b3a9c6ea2e44253696be9f04
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 264704 bytes
SHA-256: b77cf0d3cd254b872328a6a044e8390b518f5c54c3a217c8d61dbca512b92f60
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 259898 bytes
SHA-256: 1d2081439d9d900c66af72f0a185c48eb05c6580a8382880dfc17dc75969beca
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_12586341359297266181994924382754737461562679734445128144538196337346625579584927.jar ole-package-payload OOXML word/embeddings/oleObject1.bin Ole10Native payload: display_name=12586341359297266181994924382754737461562679734445128144538196337346625579584927.jar; full_path=C:\Users\TESTER\AppData\Local\Temp\12586341359297266181994924382754737461562679734445128144538196337346625579584927.jar; temp_path=; def_file= 258932 bytes
SHA-256: 9da7a50813c38b5d848c57276b171cf50ac5f2d6f513f42f79c047daa9103945
emf_00.emf ooxml-emf OOXML EMF part: word/media/image2.emf 5148 bytes
SHA-256: 200329d065d730e6407a48d7db7b36b4def3784f2224e8bcdf026d2891bea8a4

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