Malicious Office (OOXML) / .DOC — malware analysis report

Static analysis result for SHA-256 191da1dc372bb337…

MALICIOUS

Office (OOXML) / .DOC

351.5 KB Created: 2023-02-28 16:44:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2023-03-07
MD5: b85f98fe9f230756570dc9da1290d610 SHA-1: 12ff68edd50addfc59aadabece0f062a10c39739 SHA-256: 191da1dc372bb33705cb2d6e728239279e6ca606e91808ee033b2dd4d47648ce
82 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File

The sample leverages an OOXML OLE2Link remote loader, indicative of CVE-2017-0199 exploitation. It attempts to fetch a secondary payload from the URL https://xllcallingkiki.blogspot.com/atom.xml. This technique is commonly used to download and execute further malicious content, establishing a multi-stage attack.

Heuristics 3

  • OOXML OLE2Link remote loader — CVE-2017-0199 related high CVE related CVE_2017_0199_RELATED
    Document contains an o:OLEObject Type=Link whose external oleObject relationship points to a remote URL. This is the OOXML OLE2Link activation shape associated with CVE-2017-0199 delivery, but the local file does not expose URL Moniker bytes or a weaponized extension/content type, so the exact CVE cannot be proven statically.
  • External OLE object relationship high OOXML_EXTERNAL_OLE_OBJECT
    Document contains an oleObject relationship whose target is an external HTTP(S) URL. Office resolves this through OLE/object update paths rather than as a normal user-clicked hyperlink.
  • 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.openxmlformats.org/markup-compatibility/2006
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/officeDocument/2006/math
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
    • http://schemas.openxmlformats.org/wordprocessingml/2006/main
    • http://schemas.microsoft.com/office/word/2006/wordml
    • https://xllcallingkiki.blogspot.com/atom.xml
    • https://urlcallinghta2.blogspot.com/atom.xml

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