Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 67e532c280d42c65…

MALICIOUS

Office (OOXML)

205.7 KB Created: 2020-10-30 21:12:00 UTC Authoring application: Microsoft Office Word 14.0000 First seen: 2020-11-12
MD5: 52d24b3e8528e5f7b4582b537b589754 SHA-1: 3da66805cd2d62866d9282f73fc8051b04bcd905 SHA-256: 67e532c280d42c659f58016357cdcecc4d66a3f1e7cd801fa6d22f399c30e998
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 196608 bytes
SHA-256: c1f749d02d609eac0015817e25054f5900bf12d11dd0eb430413a12b68aa4e02
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.97, consistent with packed or encrypted content.
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 192824 bytes
SHA-256: 144a6bfc453557dcc5f6c7ded020d37245e42eb6a6170d98118ba5147fd23129
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_69983652893892488554678389226533581535984445751332.jar ole-package-payload OOXML word/embeddings/oleObject1.bin Ole10Native payload: display_name=69983652893892488554678389226533581535984445751332.jar; full_path=C:\Users\TESTER\AppData\Local\Temp\69983652893892488554678389226533581535984445751332.jar; temp_path=; def_file= 192128 bytes
SHA-256: ba649ebd7c829df0380f0d67a7eea2bb0012194aa18ef82f25e658636e0a553b
emf_00.emf ooxml-emf OOXML EMF part: word/media/image2.emf 5132 bytes
SHA-256: 1eb6fde0e5d1119f1abce8bb8d4033ab1a8c51e11fd0bf62a8f1e98f19607a17

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