Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 b0533e2d84c9c364…

MALICIOUS

Office (OOXML)

254.2 KB Created: 2021-01-26 17:42:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2021-02-09
MD5: e108c1cb329af27a5be19b48956aba70 SHA-1: 85eb9c48f586902a0322d30776a8c7792205f0a8 SHA-256: b0533e2d84c9c364e234be3f3d7b8261430930c76710fdc56f263fefd0b6a58f
82 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 an 'Ole10Native package' that drops an auto-executable payload named 'cd203ea38008f1ec5e04a33b80ead49a0d169faa581da5287e7465b0471dfed5.exe'. This indicates a likely attack pattern involving spearphishing attachments leading to client execution of malware.

Heuristics 3

  • 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
  • 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.microsoft.com/office/drawing/2014/chartexIn 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/2012/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2015/wordml/symexIn 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 1233408 bytes
SHA-256: 4aa4cc3a5c5258022954b246444de408db6e23cfa55b1fc62f7eb10eb513e74f
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 1221612 bytes
SHA-256: ebd11066345767647c0a11e9793b31d42c8f608b2e7986b939345822bd2115f5
ooxml_oleobject_00_ole10native_00_payment_copy820-26288-27892.pif ole-package-payload OOXML word/embeddings/oleObject1.bin Ole10Native payload: display_name=payment copy#820-26288-27892.pif; full_path=C:\Users\Snake\AppData\Local\Temp\payment copy#820-26288-27892.pif; temp_path=; def_file= 1221120 bytes
SHA-256: 78374d5b7d1829707deac3eee105ebb864cf1d29f88a9288ceab68888be34061
emf_00.emf ooxml-emf OOXML EMF part: word/media/image1.emf 5148 bytes
SHA-256: 661a8cb242c5e5b8e7d176aaaa6de520d9a40ee1268dc3b469a286681074b137

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