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

Static analysis result for SHA-256 ff5e08912950194b…

MALICIOUS

Office (OOXML) / .DOC

13.5 KB Created: 2017-09-24 17:26:00 UTC Authoring application: Microsoft Office Word 14.0000
MD5: 9d71c095ed7a27278ca772977e2a605f SHA-1: efe038b4f7bd5cfa2cebd1ed79003188d8fbf000 SHA-256: ff5e08912950194b6be7e6102c3135bcd9554ac7378b1a8a78069ebb94042234
80 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File

The sample is a Microsoft Office document that contains an external OLE object pointing to 'http://van.info.vn/kest/lol.doc'. This indicates the document is designed to exploit CVE-2017-8759, a vulnerability related to OLE2Link remote document handling, to download and execute a secondary payload. The heuristic firings strongly suggest this malicious behavior.

Heuristics 3

  • 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 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/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

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