Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 0061473fc32748ea…

MALICIOUS

Office (OOXML)

230.1 KB Created: 2020-11-25 10:17:00 UTC Authoring application: Microsoft Office Word 14.0000 First seen: 2020-12-01
MD5: 32d2005ebc86e3dafa92dbffaf0e5118 SHA-1: 30492d785f91e3ea9f76185eb86aa2b597183fdb SHA-256: 0061473fc32748ea5baa55d94dfbe27da08b8ebfe517d4a5fa6908476241aade
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 223232 bytes
SHA-256: 89d901d4cd7a7c45492dbff8acddbb5e6dd8077ccd39a380e34feaa805a633fc
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 219060 bytes
SHA-256: f5f9eda683b49b1882cf714277ce6e8bd7a1824753d9c444e97a07af603fd545
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_62357142949843127243664977925978328848919577672343.jar ole-package-payload OOXML word/embeddings/oleObject1.bin Ole10Native payload: display_name=62357142949843127243664977925978328848919577672343.jar; full_path=C:\Users\TESTER\AppData\Local\Temp\62357142949843127243664977925978328848919577672343.jar; temp_path=; def_file= 218364 bytes
SHA-256: 0d0e4f80ba3642652733ec9fc6f0efed7835d341e83c483398ebb979f80603f6
emf_00.emf ooxml-emf OOXML EMF part: word/media/image2.emf 5148 bytes
SHA-256: 988bb3e337512fd4e0359b4680e860505394b5c3c05610766cc083f616df189d

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