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

Static analysis result for SHA-256 3c3e24c01a675b3b…

MALICIOUS

Office (OOXML) / .DOC

469.2 KB Created: 2023-02-20 19:53:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2023-02-21
MD5: 54d32550d7f7488629721686e9482c21 SHA-1: 69494a7dd626cc0f50e058c51dfe049282dab0ce SHA-256: 3c3e24c01a675b3b17bee9c8f560a33c3ecca8c44442fd5b3dd8c0f4429f279b
182 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution

The sample leverages known vulnerabilities (CVE-2017-0199 and CVE-2017-8759) to load external OLE objects from provided mediafire URLs. These URLs likely host malicious content intended to be downloaded and executed, serving as a dropper for further stages of the attack. The document body contains no actionable content, indicating the malicious functionality is entirely driven by the embedded external relationships.

Heuristics 5

  • CVE-2023-36884 — external RTF auto-load relationship critical CVE likely CVE_2023_36884
    Document auto-load relationship references a remote RTF file (https://www.mediafire.com/file/79jzbqigitjp2v2/P2.rtf), matching the stronger Storm-0978/RomCom external-RTF delivery shape. Plain clickable hyperlinks are not enough for this CVE rule.
  • 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.
  • 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 https://www.mediafire.com/file/jyqq6p8m6n8tm0o/P1.docx
    • https://www.mediafire.com/file/79jzbqigitjp2v2/P2.rtf
    • 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://doccallingupdate.blogspot.com/atom.xml
    • http://schemas.openxmlformats.org/officedocument/2006/relationships/oleobject

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