Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 23747ac452ff33da…

MALICIOUS

Office (OOXML)

12.7 KB Created: 2013-10-31 15:25:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2021-09-18
MD5: 520b58abb08dfd7436f837bd397f6add SHA-1: e6e62f84e0041f6b5b0968a2aecd8d8de9f843e2 SHA-256: 23747ac452ff33da9d6ef5c5bda16fcda617dc4a95f6fbc1efed18134723dbc0
282 Risk Score

Malware Insights

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

The file exhibits critical heuristic firings related to CVE-2017-0199 and CVE-2022-30190, indicating exploitation of these vulnerabilities. These exploits are designed to load external content from a specified URL, which is a common technique for downloading and executing further malicious stages. The ClamAV detection further supports the malicious nature of the file.

Heuristics 7

  • CVE-2022-30190 — Follina stage-1 external HTML oleObject critical CVE likely CVE_2022_30190
    External OLEObject relationship targets a remote .html with the Follina delivery shape (oleObject -> HTTP(S) HTML with trailing Moniker '!'). In live Follina samples the ms-msdt: trigger is served by the remote HTML, not the document itself.
  • MSHTML-style external object relationship critical CVE related OFFICE_MSHTML_EXTERNAL_OBJECT
    External relationship to http://localhost/wo.html!x-usc:http://localhost/wo.html — exploitable MSHTML/CAB/MHTML/HTA-style Office attack surface
  • 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.
  • ClamAV: Doc.Exploit.CVE-2021-40444-9891698-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Exploit.CVE-2021-40444-9891698-2
  • 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.
  • External relationship medium OOXML_EXTERNAL_REL
    External target in word/_rels/document.xml.rels: NULL
  • 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://localhost/wo.html!x-usc:http://localhost/wo.html OOXML external relationship
    • http://schemas.microsoft.com/office/word/2010/wordprocessingCanvasOOXML external relationship
    • http://schemas.microsoft.com/office/drawing/2014/chartexOOXML external relationship
    • http://schemas.openxmlformats.org/markup-compatibility/2006OOXML external relationship
    • http://schemas.openxmlformats.org/officeDocument/2006/relationshipsOOXML external relationship
    • http://schemas.openxmlformats.org/officeDocument/2006/mathOOXML external relationship
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawingOOXML external relationship
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingOOXML external relationship
    • http://schemas.openxmlformats.org/wordprocessingml/2006/mainOOXML external relationship
    • http://schemas.microsoft.com/office/word/2010/wordmlOOXML external relationship
    • http://schemas.microsoft.com/office/word/2012/wordmlOOXML external relationship
    • http://schemas.microsoft.com/office/word/2015/wordml/symexOOXML external relationship
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroupOOXML external relationship
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInkOOXML external relationship
    • http://schemas.microsoft.com/office/word/2006/wordmlOOXML external relationship
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShapeOOXML external relationship

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