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

Static analysis result for SHA-256 1e862e875511f286…

MALICIOUS

Office (OOXML) / .DOC

1.38 MB Created: 2023-01-12 21:42:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2023-01-13
MD5: e71f48371df96df28af33b5378f1b7f9 SHA-1: 4d0b456170692af5aa0e185112ab10bd64965124 SHA-256: 1e862e875511f28643f75cb7a59e2d4ad642bd9aed4a328a9cbb5304d12aa83e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious File

The sample leverages an OOXML OLE2Link external object to load a remote DLL, exploiting CVE-2017-0199. The embedded URLs point to DLL files hosted on Mediafire, indicating a likely downloader or initial access mechanism. The document's structure and heuristics strongly suggest it's designed to trick the user into executing a malicious payload.

Heuristics 3

  • 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 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/hizw0a037mejwi9/loding32x.xll/file
    • https://www.mediafire.com/file/k8ngksipws7i01f/loading.xll/file
    • 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
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/exif/1.0/

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