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

Static analysis result for SHA-256 dedcb603e30c9087…

MALICIOUS

Office (OOXML) / .DOC

15.7 KB Created: 2022-06-02 18:39:00 UTC Authoring application: Microsoft Office Word 15.0000 First seen: 2022-08-17
MD5: d37ab363b624343f7bd8fea9985f60a3 SHA-1: 37a526d66f003f06ee4beb7c7fa34e516c90a388 SHA-256: dedcb603e30c9087555cd62cc302c3d9c1375c30c6d1037b677c3f7db6ef48bc
162 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.001 PowerShell T1204.001 Malicious File: Malicious Link

The sample leverages OOXML OLE2Link and OLE object vulnerabilities, specifically related to CVE-2017-0199 and CVE-2022-30190 (Follina). These heuristics indicate the document is designed to fetch and execute a payload from the external URL http://194.5.192.33/payload.html. The embedded OLE object further supports the malicious intent of this document.

Heuristics 5

  • 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.
  • 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 OLE object medium OOXML_OLE_OBJECT
    Document contains an embedded OLE object
  • 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://194.5.192.33/payload.html
    • 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/2012/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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
08d208d14edb553cb7143e2db211a122a12a5d9d38fb70b6db32e093692242d0		 ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject1.bin 171520 bytes
ooxml_oleobject_00_ole10native_00.bin
58c436e84933015b914ed77fa6b8b3b7b2bd53270de6b829432b1cc46dee8302		 ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 167172 bytes

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