Win.Dropper.MyWindowKitten-7505203-0 — Office (OOXML) malware analysis

Heuristics 8

• ClamAV: Win.Dropper.MyWindowKitten-7505203-0 critical CLAMAV_DETECTION
  ClamAV detected this file as malware: Win.Dropper.MyWindowKitten-7505203-0
• 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.
• Remote image (web beacon / tracking pixel) medium OOXML_IMAGE_BEACON
  Document references an external image URL — loads automatically on open, revealing IP address and timestamp to the server (used for phishing tracking and NTLM hash theft on corporate networks)
• External relationship medium OOXML_EXTERNAL_REL
  External target in word/_rels/document.xml.rels: http://u.mywindows24.in/img/513e94bb4c8e1d05014c92ae8a577332/9b4eb90ed3d75b4a8/general.png
• Embedded OLE object medium OOXML_OLE_OBJECT
  Document contains an embedded OLE object
• Payload URL recovered from embedded OLE object (2 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).
• 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://u.mywindows24.in/img/%s/8544b90ed3d7673a1/general.png In document text (OOXML body / shared strings)

  • http://u.mywindows24.in/img/%s/8544b90ed3d7673a1/n%d.pngIn document text (OOXML body / shared strings)
  • http://u.mywindows24.in/img/513e94bb4c8e1d05014c92ae8a577332/9b4eb90ed3d75b4a8/general.pngOOXML external relationship
  • http://schemas.microsoft.com/office/word/2010/wordprocessingCanvasIn 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/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)

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