Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 85218477e69ef088…

MALICIOUS

Office (OOXML)

73.9 KB Created: 2020-02-16 16:59:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2020-09-04
MD5: 68b2651a1e09d43a7d7f8eb7c143358f SHA-1: d7a94e0a7d249ac1db221b992895e7a34f39bd97 SHA-256: 85218477e69ef0889cc78566c972c53332046f1c5d1201bae9bf288fafa27c53
122 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample exploits CVE-2023-36884 by referencing a remote RTF template located at http://joeing.rapiddns.ru/1/1.rtf?raw=true. This technique is commonly used to download and execute malicious content, likely leading to further compromise. The document's structure and the specific CVE targeted suggest a malicious intent to execute arbitrary code.

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://joeing.rapiddns.ru/1/1.rtf?raw=true), matching the stronger Storm-0978/RomCom external-RTF delivery shape. Plain clickable hyperlinks are not enough for this CVE rule.
  • Remote template injection high OOXML_REMOTE_TEMPLATE
    Document references a remote template URL (http://joeing.rapiddns.ru/1/1.rtf?raw=true) — a common remote-template-injection vector used by Hancitor, Emotet and many phishing campaigns. Word can fetch and apply the remote template; macros in that template may execute depending on Office policy and trust state.
  • External relationship medium OOXML_EXTERNAL_REL
    External target in word/_rels/settings.xml.rels: http://joeing.rapiddns.ru/1/1.rtf?raw=true
  • 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://joeing.rapiddns.ru/1/1.rtf?raw=true Remote template reference
    • 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://schemas.openxmlformats.org/officedocument/2006/relationships/attachedtemplateIn document text (OOXML body / shared strings)

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