Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 c98f01ae6753c457…

MALICIOUS

Office (OOXML)

11.6 KB Created: 2018-11-22 22:30:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2019-05-16
MD5: ad9227ffeaaf11bb7e43d07f6fb3dba4 SHA-1: 286c22e90b6a3fe56e6f932c02dda18467f943d3 SHA-256: c98f01ae6753c4578c167ed514765f8a6d987056d9923cc88f946e467497a88d
82 Risk Score

Malware Insights

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

The sample is an OOXML document that leverages CVE-2017-0199 to load an external OLE object from the URL https://urlz.fr/8gYg. This indicates an attempt to download and execute a remote payload, likely as part of a spearphishing campaign. The document body contains the text 'PAYMENT UPDATE', suggesting a lure for financial information.

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 http://schemas.openxmlformats.org/markup-compatibility/2006 In document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/mathIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/wordprocessingml/2006/mainIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)
    • https://urlz.fr/8gYgIn document text (OOXML body / shared strings)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
emf_00.emf ooxml-emf OOXML EMF part: word/media/image1.emf 6236 bytes
SHA-256: 0afb79752050d4f505ee3eca57137ffe719a8cefecdba75ecf44027fb60a3abe

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