Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 0cfd027e9ba4588c…

MALICIOUS

Office (OOXML)

207.3 KB Created: 2021-03-02 07:40:00 UTC Authoring application: Microsoft Office Word 14.0000 First seen: 2021-03-31
MD5: 824d183717a2b8e99270bbfc53efa071 SHA-1: c933c6007cc6cc3682fc6e7eb02dc4a3c7e29a52 SHA-256: 0cfd027e9ba4588c603b2db66dfc70b0369f149d00e1a8f95e4ef24b50f869a1
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 198656 bytes
SHA-256: d1015ca24403e2332d79c45b50478669b032f988ac5016c3d4a3bfe4494fc997
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 194097 bytes
SHA-256: cd819e12181c0c9d58a61b10a224d0aafdebd24f9b01ea1278ed24f1d3f977a4
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_28828913885546978389226533581535984445751332389169923316985126125413883573737161.jar ole-package-payload OOXML word/embeddings/oleObject1.bin Ole10Native payload: display_name=28828913885546978389226533581535984445751332389169923316985126125413883573737161.jar; full_path=C:\Users\TESTER\AppData\Local\Temp\28828913885546978389226533581535984445751332389169923316985126125413883573737161.jar; temp_path=; def_file= 193131 bytes
SHA-256: 3a9d9ccd017116b666e8a56f9b5a9418e911602e8f3006ef695b471e7f7d39f2
emf_00.emf ooxml-emf OOXML EMF part: word/media/image2.emf 5148 bytes
SHA-256: 807ab20bb3334c39e7a8ff0fbaf92f214239ee8ec5de37d5c16d9bbfc17f7568

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