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

Static analysis result for SHA-256 9fb2bd7698aa4b17…

MALICIOUS

Office (OOXML) / .DOC

12.5 KB Created: 2017-09-24 17:26:00 UTC Authoring application: Microsoft Office Word 14.0000 First seen: 2022-03-22
MD5: 2095f1245ff5e628b9ff8eee16fd3b61 SHA-1: 3695ca51af5fc84f07c18e85a873d2bf3c8225c3 SHA-256: 9fb2bd7698aa4b176df19cec13630bbedb65972997ed0d243a84028c26daa17d
142 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File

The sample leverages CVE-2017-8759 and CVE-2023-36884 vulnerabilities by including an external OLE object that loads an RTF document from http://34.221.57.122/rt.rtf. This indicates a likely attack pattern of exploiting Office vulnerabilities to download and execute a second-stage payload. The specific family could not be determined.

Heuristics 4

  • CVE-2023-36884 — external RTF auto-load relationship critical CVE likely CVE_2023_36884
    Document auto-load relationship references a remote RTF file (http://34.221.57.122/rt.rtf), matching the stronger Storm-0978/RomCom external-RTF delivery shape. Plain clickable hyperlinks are not enough for this CVE rule.
  • OOXML OLE2Link remote document — CVE-2017-8759 related high CVE related CVE_2017_8759_RELATED
    Document contains an o:OLEObject Type=Link whose external oleObject relationship fetches a remote Office-looking document. That is the OOXML OLE2Link staging shape used by CVE-2017-8759 campaigns when the remote document/WSDL supplies the SOAP moniker payload; the local file alone does not contain the WSDL body needed for an exact match.
  • 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://34.221.57.122/rt.rtf
    • http://schemas.microsoft.com/office/word/2010/wordprocessingCanvas
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/officeDocument/2006/math
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
    • http://schemas.openxmlformats.org/wordprocessingml/2006/main
    • http://schemas.microsoft.com/office/word/2010/wordml
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroup
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInk
    • http://schemas.microsoft.com/office/word/2006/wordml
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShape
    • http://schemas.openxmlformats.org/officedocument/2006/relationships/oleobject

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