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

Static analysis result for SHA-256 118a9c999b0464d4…

MALICIOUS

Office (OOXML) / .DOC

21.4 KB Created: 2017-12-14 13:55:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 3cac69b3c4ad6921ee4bca6c9f54f2b9 SHA-1: 6d7eea5ccdb09213d337edb50f3b624f1376bad2 SHA-256: 118a9c999b0464d4b0507f0441a97787255ec48b047993b561065c64891544db
82 Risk Score

Malware Insights

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

The sample is a Microsoft Office document that leverages an external OLE object to exploit CVE-2017-8759. This exploit is designed to download and execute a second-stage payload from the specified URL. The presence of the CVE-2017-8759 related heuristic strongly indicates this attack vector.

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://198.12.107.229/....wWw..-wWW-w.wW.-ww--w.-.wWw......------wWW.W.....Ww..--w.wW....wWw..-wWW-w.wW.-ww--w.-.wWw......------wWW.W.....Ww..--w.wW/....wWw..-wWW-w.wW.-ww--w.-.wWw......------wWW.W
    • http://schemas.microsoft.com/office/word/2010/wordprocessingCanvas
    • http://schemas.microsoft.com/office/drawing/2014/chartex
    • 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/2015/wordml/symex
    • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
emf_00.emf
c3d4c5dfe019e61c614b81733887bf8fd99cb8f2410d9a04904661c77c0a64e7		 ooxml-emf OOXML EMF part: word/media/image1.emf 49184 bytes

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