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

Static analysis result for SHA-256 900c23ff64426837…

MALICIOUS

Office (OOXML) / .DOC

10.2 KB Created: 2023-02-23 08:52:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2023-02-24
MD5: 102c32c58f35c17238274cccfa8f5e3d SHA-1: 339c7463c83f1923bce00adad61ce8de82753652 SHA-256: 900c23ff6442683733cfc05064367dd17fb046334d3c078c5aec8b8057bebd84
82 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution T1059 Command and Scripting Interpreter

The sample is an OOXML document that leverages an external OLE object to load content from a remote URL. This is indicative of an exploit targeting CVE-2017-0199, which allows for remote code execution by tricking the application into fetching and executing a malicious file. The primary IOC is the URL used to fetch the secondary payload.

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://urlintimacygoomb.blogspot.com/atom.xml

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