Malicious Office (OOXML) — malware analysis report

Heuristics 7

• 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.
• Ole10Native package payload is a download-and-execute script critical OFFICE_PACKAGE_SCRIPT_DROPPER
  The OLE Package's embedded payload contains a script that hosts a shell (PowerShell/WScript/mshta), fetches a remote resource, and executes it — a download-and-run dropper. Embedding such a script inside an Office document via the Object Packager is a direct user-execution delivery technique (MITRE T1204.002), not a benign attachment.
• Embedded OLE object medium OOXML_OLE_OBJECT
  Document contains an embedded OLE object
• Suspicious extracted artifact medium 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.
• External hyperlinks (1) low OOXML_EXTERNAL_HYPERLINKS
  Document contains 1 external hyperlink — clickable URLs are stored as external relationships. First target: http://www.lipsum.com/
• Payload URL recovered from embedded OLE object (14 URLs) info OOXML_EMBEDDED_OBJECT_URL
  An embedded OLE object (xl/word/ppt embeddings) carries a next-stage download URL in its Ole10Native/Package stream — stored literally (incl. UTF-16) or base64-encoded — which the package-level URL sweep does not see. Surfaced as an IOC; self-validating (only real payload hosts).
• 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://ocsp.verisign.com0 In document text (OOXML body / shared strings)

  • http://sv.symcd.com0&In document text (OOXML body / shared strings)
  • http://s2.symcb.com0In 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.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/2006/wordmlIn document text (OOXML body / shared strings)
  • http://nsis.sf.net/NSIS_ErrorEmbedded OLE package script
  • http://crl.verisign.com/pca3.crl0In document text (OOXML body / shared strings)
  • https://www.verisign.com/cps0In document text (OOXML body / shared strings)
  • http://logo.verisign.com/vslogo.gif04In document text (OOXML body / shared strings)
  • http://sv.symcb.com/sv.crl0fIn document text (OOXML body / shared strings)
  • https://d.symcb.com/cps0%In document text (OOXML body / shared strings)
  • https://d.symcb.com/rpa0In document text (OOXML body / shared strings)
  • http://sv.symcb.com/sv.crt0In document text (OOXML body / shared strings)
  • http://www.symauth.com/cps0In document text (OOXML body / shared strings)
  • http://www.symauth.com/rpa00In document text (OOXML body / shared strings)
  • http://s1.symcb.com/pca3-g5.crl0In document text (OOXML body / shared strings)
  • http://www.lipsum.com/Document hyperlink
  • http://www.w3.org/1999/02/22-rdf-syntax-ns#Embedded OLE package script
  • http://ns.adobe.com/xap/1.0/Embedded OLE package script
  • http://ns.adobe.com/xap/1.0/mm/Embedded OLE package script
  • http://ns.adobe.com/xap/1.0/sType/ResourceRef#Embedded OLE package script
  • http://www.symauth.com/cps0(In document text (OOXML body / shared strings)

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